Pawg Module

Kev tswj cov khoom siv vuam

1. Cov piv txwv ntawm cov khoom sib xyaw thiab cov txiaj ntsig ntawm kev ua tau zoo ntawm cov khoom siv tsis muaj txhuas SAC305 yog dab tsi?

Cov khoom xyaw: Sn96.5Ag3.0Cu0.5, qhov taw tes yaj 217 ℃. Cov txiaj ntsig: 30% txhim kho kev tiv thaiv oxidation, ua raws li RoHS cov lus qhia ib puag ncig, muaj zog ntseeg tau kub, thiab lub zog kho tshuab khaws cia ntau tshaj 85% tom qab laus ntawm 150 ℃ rau 1000 teev.
2. Lub ntsiab lus eutectic ntawm cov hlau nplaum solder cuam tshuam li cas rau cov txheej txheem vuam?

Cov eutectic solders (xws li Sn63Pb37) tsis muaj thaj chaw sib koom ua ke ntawm cov khoom khov thiab kua thaum yaj, nrog rau lub qhov rais kub vuam nqaim, xav kom qhov kub ntawm reflow soldering siab tshaj 50-70 ℃ siab dua qhov chaw yaj; cov non-eutectic solders muaj thaj chaw sib koom ua ke ntawm cov khoom khov thiab kua, xav tau kev tswj qhov kub kom meej kom tsis txhob muaj kev sib koom ua ke tsis txaus.
3. Yuav ua li cas thiaj paub qhov txawv ntawm cov ntawv thov ntawm flux nrog cov qib kev ua ub no sib txawv?

Qib R (kev ua haujlwm tsawg): Cov xwm txheej huv si xws li aerospace thiab kev kho mob, nrog rau kev tiv thaiv rwb thaiv tsev ≥10¹²Ω;

Qib RA (kev ua haujlwm nruab nrab): Cov khoom siv hluav taws xob rau cov neeg siv khoom, muaj peev xwm tswj tau qhov tsis zoo ntawm kev vuam ≤0.5%;

Qib SA (ua haujlwm muaj zog): Cov chaw uas raug oxidized hnyav heev, yuav tsum tau ntxuav kom huv si kom tiv thaiv kev xeb.
4. Cov qauv ntawm cov flux content rau cov hlau solder thiab lawv qhov cuam tshuam rau kev vuam yog dab tsi?

Cov ntsiab lus txheem: 1.0% -3.0%. Cov ntsiab lus tsawg dhau ua rau tsis txaus tshem tawm cov yeeb yaj kiab oxide, ua rau muaj qhov tsis zoo ntxiv los ntawm 20% -30%; cov ntsiab lus ntau dhau ua rau muaj cov khoom seem ntau dhau cuam tshuam rau kev rwb thaiv tsev, nrog rau 1.8% -2.2% feem ntau siv rau hauv kev sib dhos hluav taws xob.
5. Qhov faib me me ntawm cov hmoov hlau hauv cov tshuaj nplaum solder cuam tshuam li cas rau kev ua haujlwm luam ntawv?

Hom3 (25-45μm): Haum rau cov ntaub qhwv nrog qhov sib nrug tshaj 0.5 hli, luam ntawv demolding defect rate
Hom4 (20-38μm): Haum rau qhov sib nrug zoo ntawm 0.3 hli, nws yooj yim rau stencil clogging nrog cov kev tsis raug (qhov muaj feem + 15%).
6. Qhov ntau thiab tsawg ntawm qhov kub thiab txias thiab av noo nyob rau hauv qhov chaw cia khoom rau cov tshuaj nplaum solder yog dab tsi?

Kub: 0-10 ℃ (nyob rau hauv ± 2 ℃ fluctuation), av noo: RH ≤ 60%. Viscosity hloov pauv tus nqi nce ntxiv los ntawm 5% -8% ib hnub thaum qhov kub hloov pauv ntau tshaj ± 2 ℃, thiab av noo ntau dhau ua rau oxidation sai dua.
7. Lub sijhawm cia khoom ntev tshaj plaws rau cov hlau nplaum tsis tau qhib yog dab tsi?

Cov hlau nplaum uas muaj cov hlau txhuas: 3-5 xyoos (15-25 ℃, RH≤60%);

Cov hlau nplaum uas tsis muaj txhuas: 2-3 xyoos. Kev oxidation yuav nce ntxiv tom qab lub sijhawm ntawd, nrog rau qhov porosity tej zaum yuav nce mus txog 10% -15%.
8. Vim li cas cov kua dej yuav tsum khaws cia kom deb ntawm lub teeb?

Cov khoom xyaw nquag ntawm cov kua qaub (xws li cov organic acids) lwj sai thaum raug lub teeb, nrog rau kev ua haujlwm txo qis 40% tom qab 1 lub hlis ntawm kev raug lub teeb, thaum tsuas yog 10% -15% txo qis hauv 6 lub hlis ntawm kev khaws cia tsis muaj teeb.
9. Vim li cas thiaj txwv tsis pub do thaum lub sijhawm rov qab kub ntawm cov tshuaj nplaum uas tau los ntawm qhov chaw txias?

Kev sib xyaw ua rau qhov kub sab hauv tsis sib xws, ua rau qhov chaw kho sai sai lossis cov kuab tshuaj tsis zoo. Qhov sib txawv ntawm viscosity ≤5% tom qab 4-6 teev ntawm qhov kub rov qab zoo, thaum 违规搅拌 (kev sib xyaw tsis raug) tuaj yeem ua rau qhov sib txawv txog li 20%.
10. Lub voj voog calibration rau cov ntsuas kub thiab av noo hauv cov chaw khaws cov khoom siv solder yog dab tsi?

Kho txhua 6 lub hlis kom paub tseeb tias qhov kub thiab txias yuam kev ± 1 ℃ thiab qhov av noo yuam kev ± 3% RH, zam kev khaws cia tsis raug.
11. Lub sijhawm siv ntau tshaj plaws ntawm cov tshuaj txhuam solder qhib rau ntawm lub tshuab luam ntawv yog dab tsi?

Siv tas mus li yuav tsum tsis pub tshaj 8 teev ntawm chav sov 20-25 ℃ thiab RH≤60%. Qhov viscosity nce ntxiv 30% -50% thaum tshaj qhov ntau, nrog rau qhov luam tawm tsis zoo nce mus txog 15% -20%.
12. Yuav ua li cas thiaj txiav txim siab tau lub voj voog hloov pauv ntawm cov kua solder hauv lub tank soldering nthwv dej?

Txheeb xyuas los ntawm qhov ntau lawm thiab qhov ntau ntawm cov khoom siv solder, hloov txhua 500-1000㎡ PCB tsim tawm; hloov ua ntej thaum cov ntsiab lus tooj liab > 0.8%, txwv tsis pub qhov tsis xws luag nce ntxiv 25% -35%.
13. Kev sib raug zoo ntawm kev siv hlau solder thiab qhov loj ntawm cov solder sib koom ua ke hauv kev xaiv vuam yog dab tsi?

Kev siv nyiaj ntau ntxiv 15% -20% rau txhua qhov nce 0.1 hli ntawm txoj kab uas hla ntawm cov khoom sib koom ua ke. Kev siv tuaj yeem kwv yees (kwv yees) los ntawm kev xam qhov ntim ntawm cov khoom sib koom ua ke (SAC305 qhov ceev 7.4g / cm³).
14. Qhov sib xyaw ua ke zoo tshaj plaws ntawm qhov kub ntawm lub taub hau soldering thiab lub sijhawm soldering hauv kev vuam tes yog dab tsi?

Kub: 350-380 ℃, lub sijhawm: 2-3 vib nas this. Tshaj 400 ℃ lossis >5 vib nas this yooj yim ua rau cov khoom puas tsuaj,
15. Lub kaum sab xis ntawm lub squeegee cuam tshuam li cas rau qhov zoo ntawm kev luam ntawv thaum lub sijhawm luam ntawv solder paste?

Lub kaum sab xis 45°-60° yog qhov zoo tshaj plaws. 60° yuav muaj dej txaws thiab dej khov, nrog rau qhov tsis zoo nce ntxiv 8%-10% rau txhua qhov sib txawv 5°.
16. Yuav ua li cas thiaj nrhiav tau cov qhov khoob sab hauv hauv cov pob qij txha los ntawm X-Ray?

X-Ray tuaj yeem ntes cov qhov khoob nrog lub cheeb tsam ≥0.1 hli. IPC-A-610 tus qauv: thaj chaw khoob ≤25% rau cov khoom chav kawm B, ≤15% rau chav kawm C, nrog rau cov qhov khoob ntau dhau cuam tshuam rau kev tso cua sov thiab lub zog.
17. Cov xwm txheej txheem thiab qhov sib txawv ntawm kev tso cai rau kev sim viscosity ntawm cov tshuaj nplaum solder yog dab tsi?

Cov xwm txheej: 25±0.5℃, kev sib hloov ceev 5rpm, sim rau 60 vib nas this. SAC305 tus qauv viscosity: 80-120Pa·s, yuav tsum tau kho yog tias qhov sib txawv tshaj ±15%.
18. Cov txheej txheem sim lub zog tensile thiab cov qauv tsim nyog rau cov pob qij txha solder yog dab tsi?

Sim nrog lub tshuab ntsuas tensile ntawm 5 hli / feeb ceev. ≥0.5N rau pob 0603, ≥1.5N rau QFP leads, lub zog tsis txaus uas yuav ua tsis tiav hauv qab kev co.
19. Yuav ua li cas los txheeb xyuas cov qauv ntawm cov pob qij txha los ntawm kev faib cov metallographic?

Saib xyuas hauv qab lub tshuab tsom iav tom qab sib tsoo thiab txhuam, tsom mus rau qhov tuab ntawm IMC txheej (1-3μm rau SAC305), >5μm ua rau cov pob qij txha tawg thiab luv dua 50%.
20. Tus qauv ntsuas kev huv ntawm cov ion rau cov seem flux yog dab tsi?

Kev sim los ntawm ion chromatography, ion residue ib cheeb tsam chav tsev ≤1.5μg / cm² (hauv NaCl sib npaug), ntau dhau yooj yim ua rau electrochemical migration luv luv circuits.
21. Qhov kub ntawm qhov kev ua ntej ntawm kev rov ua dua soldering cuam tshuam li cas rau kev vuam?

Tus nqi ntawm 1-3 ℃ / s yog qhov tsim nyog. >5 ℃ / s yooj yim rau kev tawg ntawm cov khoom thermal,
22. Hauv cov txheej txheem ob lub nthwv dej soldering, lub luag haujlwm thiab cov chaw teeb tsa ntawm nthwv dej pem hauv ntej thiab nthwv dej rov qab yog dab tsi?

Nthwv dej pem hauv ntej (nthwv dej turbulent): Qhov siab ntawm nthwv dej 30-50 hli, ceev 2-3m/min, ntxuav cov dej ntws thiab cua;

Ntxaib rov qab (ntxoov du): Qhov siab ntawm nthwv dej 20-30 hli, qhov ceev 1.5-2.5m/min, ua rau cov pob qij txha sib txuas zoo li cov hlau nplaum.
23. Yuav ua li cas kom txo tau qhov tawg ntawm cov tshuaj nplaum los ntawm kev ua kom zoo dua qhov tsim qauv qhib stencil?

Siv cov qhov qhib uas muaj cov kauj ruam thiab cov ces kaum uas txiav los ntawm laser. Txo qhov qhib QFP uas muaj 0.3 hli los ntawm 10%-15% thiab ntxiv cov ces kaum uas muaj 0.05 hli, txo qhov feem pua ntawm kev tawg ntawm 12% mus rau 3%-5%.
24. Qhov cuam tshuam ntawm kev tiv thaiv nitrogen rau qhov zoo ntawm kev vuam hauv kev xaiv vuam yog dab tsi?

Ib puag ncig nitrogen (cov pa oxygen
25. Yuav ua li cas kho qhov reflow soldering txias raws li PCB thickness?

Rau txhua qhov nce 0.5 hli ntawm PCB tuab, txo qhov txias ntawm 1-2 ℃ / s. Txias sai dhau (> 5 ℃ / s) rau cov laug cam tuab uas yooj yim tawg, qeeb dhau cuam tshuam rau kev ua haujlwm zoo thiab ua rau oxidation.
26. Lub hauv paus ntsiab lus sib phim ntawm qhov ceev ntawm kev luam ntawv thiab qhov viscosity ntawm cov tshuaj nplaum solder yog dab tsi?

Qhov viscosity siab dua, qhov qeeb dua qhov demolding ceev. Viscosity siab (>150Pa·s): 1-2mm/s, viscosity qis (
27. Kev sib raug zoo ntawm tus naj npawb ntawm cov cheeb tsam kub reflow soldering thiab kev vuam ntawm lub rooj tsavxwm sib txuas yog dab tsi?

Cov khoom siv nrog 8 lossis ntau thaj chaw kub yog qhov tsim nyog dua rau cov laug cam Circuit Court siab, txhim kho tus nqi tsim nyog los ntawm 85% mus rau ntau dua 95% piv rau cov khoom siv 6-cheeb tsam, nrog rau kev tswj qhov kub kom meej dua.
28. Qhov cuam tshuam ntawm lub cuab yeej nplawm hauv lub tank soldering nthwv dej ntawm qhov sib xws ntawm cov kua solder yog dab tsi?

Qhov kev sib hloov ceev ntawm 20-40rpm muab qhov zoo tshaj plaws ntawm cov kua solder sib xws. Tom qab tsis txhob do, qhov sib txawv ntawm qhov kub ntawm cov khaubncaws sab saud thiab sab qis nce ntxiv 3-5 ℃ ib teev, nrog rau kev sib txawv ntawm cov khoom sib xyaw thiab qhov tsis xws luag nce ntxiv 10% -15%.
29. Qhov cuam tshuam ntawm qhov tseeb ntawm cov tshuaj tsuag tin ntawm lub nozzle vuam xaiv rau ntawm cov pob qij txha me me yog dab tsi?

Yuav tsum tswj qhov tseeb kom tsis pub dhau ±0.01mg. Rau cov pob khoom 0201, qhov sib txawv >±0.02mg ua rau muaj qhov luv luv ntawm kev sib txuas / tsis txaus ntawm 40% -50%, uas cuam tshuam loj heev rau cov txiaj ntsig.
30. Qhov kev tswj hwm qhov nro rau lub tshuab pub hlau solder yog dab tsi?

Kev nruj ntawm 0.8-1
31. Cov txheej txheem txheem thiab cov kev ceev faj rau kev siv cov hlau tsis muaj lead rov qab yog dab tsi?

Txheej Txheem: Kev sau ua pawg → kev rho tawm cov khoom tsis huv → kev kho cov khoom sib xyaw. Qhov kub ntawm kev rho tawm 280-320 ℃, cov ntsiab lus tin ≥99.5% tom qab tshem tawm cov khoom tsis huv. Tiv thaiv kom tsis txhob muaj kuab paug hlau hnyav; cov dej khib nyiab yuav tsum tau neutralized thiab precipitated kom ua tau raws li GB 8978-1996 cov qauv tso tawm.
32. Cov khoom tseem ceeb ntawm cov pa roj uas hloov pauv tau yooj yim thiab lawv cov kev txwv rau kev ua haujlwm yog dab tsi?

Muaj abietic acid thiab isopropanol. Cov kev txwv rau kev raug tshuaj thaum ua haujlwm: abietic acid 5mg/m³ (qhov nruab nrab ntawm lub sijhawm), isopropanol 980mg/m³. Nruab nrog lub tshuab ua pa zoo kom tiv thaiv kev ua pa thiab kev khaus ntawm lub paj hlwb.
33. Cov cai faib cov khib nyiab phom sij thiab cov kev cai pov tseg rau cov khoom siv solder pov tseg yog dab tsi?

Raug cais ua HW49 (tus lej 900-041-49), yuav tsum tau muab pov tseg los ntawm cov chaw tsim nyog, ua raws li Cov Kev Ntsuas Kev Tswj Xyuas Cov Pov Tseg Phom Sij, thiab txwv tsis pub sib xyaw nrog cov pov tseg hauv tsev.
34. Cov kev cai ntawm qib tiv thaiv kev tawg rau cov chaw khaws cov khoom siv solder yog dab tsi?

Qib tiv taus kev tawg Ex dⅡBT4 yog qhov yuav tsum tau rau kev khaws cov kua hluav taws uas yooj yim hlawv. Siv cov teeb pom kev zoo / cov qhov hloov pauv uas tiv taus kev tawg thiab txwv tsis pub siv cov khoom siv uas ua rau muaj hluav taws. Kev tsis ua raws li txoj cai ua rau muaj kev pheej hmoo hluav taws / tawg ntau ntxiv 30% -50%.
35. Yuav ua li cas thiaj tiv thaiv tau qhov oxidation theem ob ntawm cov solder dross thaum lub sijhawm khaws cia?

Khaws cia rau hauv cov thawv kaw qhuav uas muaj 0.5%-1.0% BHT antioxidant. Kev oxidation nce ntxiv 50% hauv 24 teev thaum raug rau; kev khaws cia kaw ntev lub sijhawm rov ua dua tshiab mus txog 3-6 lub hlis.
36. Yuav ua li cas thiaj li txo tau cov nqi los ntawm kev ua kom zoo dua cov tuab ntawm cov ntawv luam tawm solder paste?

Txo qhov tuab ntawm 0.15mm mus rau 0.12mm raws li kev ua raws li qhov zoo, txo kev siv los ntawm 20% -25%. Kev ua kom zoo dua ntawm DOE txo tus nqi ib PCB los ntawm 0.3-0.5 RMB.
37. Tus nqi poob nruab nrab ntawm kev lag luam ntawm cov hlau nplaum thiab kev ntsuas txo qis yog dab tsi?

Qhov nruab nrab ntawm kev lag luam: 8% -12%. Kev ntsuas: Kev pub hlau tsis siv neeg (txo qhov poob los ntawm 3-5%), cov txheej txheem zoo tshaj plaws (txo qhov kev sib txuas khoob los ntawm 15% -20%), kev siv hlau pov tseg dua (70% -80% tus nqi rov qab), tuaj yeem txo qis rau 5% -8%.
38. Lub kaw lus ntsuas kev ua tau zoo ntawm cov khoom siv solder los ntawm ntau hom yog dab tsi?

Cov Cim Qhia: Tus nqi ib chav, cov ntsiab lus hlau (+5% tus nqi rau ib +1%), tus nqi luam ntawv tsis zoo (-0.5 RMB/PCB ib -1%), lub sijhawm khaws cia (-3% tus nqi khaws cia ib +1 lub hlis), xam los ntawm qhov ntsuas hnyav.
39. Yuav ua li cas thiaj txo tau cov dej khib nyiab los ntawm kev ua kom zoo dua qub?

Kev Ntsuas: Kev tiv thaiv nitrogen (txo cov dross los ntawm 40% -60%), roj tiv thaiv oxidation (txo tus nqi oxidation los ntawm 50% -70%), kev tswj kub ± 2 ℃, tuaj yeem txo cov dross los ntawm 5kg / cov khoom siv rau 2-3kg / cov khoom siv.
40. Kev sib raug zoo ntawm kev hloov pauv ntawm cov khoom muag solder thiab kev ua haujlwm peev yog dab tsi?

Kev nce tus nqi hloov pauv ntawm 4 mus rau 6 zaug/xyoo txo cov nqi siv peev los ntawm 33%. Txhim kho kev ua haujlwm zoo los ntawm kev yuav khoom JIT, kev kho cov khoom muag kom zoo (txo 20% -30%), thiab lub voj voog luv dua (txo 15-20 hnub).
41. Cov txheej txheem tseem ceeb twg yuav tsum tau tsom mus rau thaum lub sijhawm kuaj xyuas daim ntawv pov thawj ISO 9001 ntawm cov neeg muab khoom siv solder?

Lub Hom Phiaj: Kev tshuaj xyuas cov khoom siv raw (kev them 100%), kev tswj hwm kev tsim khoom (piv txwv li, lub sijhawm sib tov cov tshuaj nplaum sib txawv ≤5%), kev sim khoom tiav (≥10 yam khoom ib pawg), kev tswj cov khoom tsis ua raws li qhov yuav tsum tau ua (lub sijhawm ≥95%).
42. Yuav ua li cas los ntsuam xyuas lub peev xwm R&D ntawm tus neeg muag khoom los ntawm kev tshuaj xyuas hauv chaw?

Cov ntsuas kev ntsuam xyuas: cov khoom siv R&D (DSC, SEM muaj), piv rau cov neeg ua haujlwm R&D (≥15%), suav cov ntawv pov thawj (≥3 tshiab txhua xyoo), lub voj voog tsim khoom tshiab (qhov nruab nrab ≤6 lub hlis).
43. Yuav ua li cas txiav txim siab qhov piv txwv zoo ntawm cov khoom siv solder?

Piv: 5% -10% ntawm cov nyiaj yuav khoom txhua xyoo. Rho tawm yog tias muaj qhov tsis zoo ntawm cov khoom ntau dua 3%, xa rov qab tom qab 3 pawg khoom sib law liag kom txhawb kev tswj xyuas zoo.
44. Cov kev cai tseem ceeb twg yuav tsum muaj nyob rau hauv daim ntawv cog lus nrog cov neeg muab khoom siv solder?

Muaj xws li: Cov khoom sib xyaw ua ke (piv txwv li, SAC305 kam rau siab Sn ± 0.5%, Ag ± 0.2%, Cu ± 0.1%), melting point (217 ℃ ± 3 ℃), viscosity (50-150 Pa·s ± 10%), qib kev ua haujlwm (piv txwv li, RA qib halide ≤ 0.5%), cov kev cai ib puag ncig (RoHS 2.0), thiab lwm yam.
45. Yuav ua li cas los tswj cov ntaub ntawv ntawm cov khoom siv solder los ntawm kev siv lub tshuab nrhiav tau zoo?

Cov ntaub ntawv ntawm lub kaw lus: Tus lej pawg, hnub tsim khoom, cov khoom sib xyaw, lub sijhawm khaws cia, thiab lwm yam, txuas nrog cov cim tshwj xeeb ntawm PCBA. Lub sijhawm qhov chaw muaj teeb meem txo qis los ntawm 24 mus rau ≤2 teev.
46. Cov hom squeegees sib txawv ua li cas rau kev luam ntawv zoo?

Polyurethane squeegee: Yooj yim, tsim rau cov viscosity qis thiab suab zoo (pins
Cov hlau squeegee: Siab hardness, haum rau cov viscosity siab thiab cov zaj duab xis tuab (pads> 0.8mm, thickness kam rau siab ± 5μm).
47. Yuav ua li cas los ntsuas qhov ua tau zoo ntawm cov txheej txheem tswj hwm solder?

Cov Cim Qhia: Kev hloov pauv ntawm cov khoom muag (qib zoo heev 8-10 zaug/xyoo), lub sijhawm txij thaum tuaj tos mus txog rau kab (≤1 teev), qhov piv ntawm lub sijhawm tsis ua haujlwm vim muaj teeb meem kev tswj hwm (
48. Yuav ua li cas thiaj daws tau qhov teeb meem los ntawm qhov pom ntawm cov khoom siv solder thaum 大面积虚焊 (kev soldering tsis txaus) tshwm sim tom qab PCBA vuam?

Cov ntsiab lus daws teeb meem:

1. Xyuas seb cov hlau nplaum puas muaj cov ntsiab lus ≥90% (tus qauv tsis muaj txhuas), qhov tsis txaus ua rau muaj kev pheej hmoo tsis txaus ntawm 40%+;

2. Xyuas kom tseeb tias cov dej num ntawm cov dej ntws ua tau raws li qib RA, kev ua haujlwm tsis txaus ua rau tsis ntub dej;

3. Paub meej tias cov tshuaj nplaum puas tas sij hawm lawm (viscosity / activity degradation).
49. Yuav ua li cas xaiv cov ntaub ntawv solder tsim nyog rau kev txheeb xyuas thaum lub sijhawm PCBA me me-kev sim ua khoom?

Cov Tswv Yim:

1. Muab qhov tseem ceeb rau tib lub qauv solder li kev tsim khoom loj kom ntseeg tau tias cov txheej txheem txuas ntxiv mus;

2. Rau cov khoom uas nyuaj, xaiv 2-3 hom uas muaj kev ua tau zoo sib xws rau kev sib piv;

3. Soj ntsuam los ntawm qhov nrawm ntawm qhov tsis zoo, cov ntaub ntawv txog lub zog tensile ntawm cov khoom sib txuas, thiab tus nqi tag nrho.
50. Yuav ua li cas los ntsuam xyuas qhov cuam tshuam ntawm qhov chaw cia khoom siv solder rau nws lub neej txee?

Cov yam tseem ceeb:

- Lub neej txee luv dua 20% rau txhua 5 ℃ dhau tus qauv (piv txwv li, muab tshuaj nplaum > 10 ℃);

- Tus nqi oxidation nce ntxiv 15% rau txhua 10% RH av noo nce;

Tshawb xyuas qhov sib raug zoo ntawm cov ntaub ntawv los ntawm kev siv cov cuab yeej ntsuas kub/av noo los kwv yees lub sijhawm khaws cia tiag tiag.
51. Yuav ua li cas txiav txim siab seb puas yuav hloov lub dab da dej solder thaum lub sijhawm kho lub tank soldering tsis tu ncua?

Cov qauv hloov pauv:

1. Cov khoom tsis huv tshaj tus qauv (piv txwv li, Cu > 0.8%, IPC-J-STD-006B), lub zog sib koom ua ke txo qis 20% -30%;

2. Cov khib nyiab solder npog ntau dua 20% ntawm qhov chaw da dej, cuam tshuam rau qhov zoo;

3. Qhov teeb meem ntawm kev vuam txuas ntxiv nce ntxiv vim muaj teeb meem hauv kev siv cov khoom siv vuam.
52. Yuav ua li cas thiaj ua kom cov phiaj xwm yuav khoom zoo dua los ntawm kev siv cov ntaub ntawv loj los tshuaj xyuas hauv kev tswj cov khoom siv solder?

Cov Txheej Txheem:

1. Tshuaj xyuas keeb kwm kev siv khoom, kev yuav khoom, thiab kev hloov pauv ntawm tus nqi kom kwv yees qhov xav tau;

2. Npaj khoom ua ntej raws li kev txiav txim raws caij nyoog kom txo tau kev pheej hmoo ntawm kev tsis muaj khoom;

3. Taug qab cov qauv nqi kom zoo tshaj plaws rau lub sijhawm yuav khoom. Cov ntaub ntawv qhia tau tias tus nqi khoom muag tau txo 15%-20% thiab tus nqi yuav khoom tau txo 8%-12%.
53. Qhov cuam tshuam ntawm kev siv ntau hom kev kho dua tshiab rau kev ntseeg tau ntawm cov khoom thaum lub sijhawm PCBA rov ua haujlwm yog dab tsi?

Kev Cuam Tshuam:

- Cov khoom sib xyaw ua ke: Kev ua haujlwm sib koom ua ke, kev ntseeg tau zoo ib yam li thawj;

- Cov khoom sib txawv (piv txwv li, cov khoom siv bismuth-based low-temperature solder): CTE mismatch loj (bismuth-based ≈2x SAC305), yooj yim tawg hauv cov voj voog thermal, kev ntseeg tau txo qis 50%+.

Kev tswj cov khoom siv vuam

1. Cov piv txwv ntawm cov khoom sib xyaw thiab cov txiaj ntsig ntawm kev ua tau zoo ntawm cov khoom siv tsis muaj txhuas SAC305 yog dab tsi?

2. Lub ntsiab lus eutectic ntawm cov hlau nplaum solder cuam tshuam li cas rau cov txheej txheem vuam?

3. Yuav ua li cas thiaj paub qhov txawv ntawm cov ntawv thov ntawm flux nrog cov qib kev ua ub no sib txawv?

4. Cov qauv ntawm cov flux content rau cov hlau solder thiab lawv qhov cuam tshuam rau kev vuam yog dab tsi?

5. Qhov faib me me ntawm cov hmoov hlau hauv cov tshuaj nplaum solder cuam tshuam li cas rau kev ua haujlwm luam ntawv?

6. Qhov ntau thiab tsawg ntawm qhov kub thiab txias thiab av noo nyob rau hauv qhov chaw cia khoom rau cov tshuaj nplaum solder yog dab tsi?

7. Lub sijhawm cia khoom ntev tshaj plaws rau cov hlau nplaum tsis tau qhib yog dab tsi?

8. Vim li cas cov kua dej yuav tsum khaws cia kom deb ntawm lub teeb?

9. Vim li cas thiaj txwv tsis pub do thaum lub sijhawm rov qab kub ntawm cov tshuaj nplaum uas tau los ntawm qhov chaw txias?

10. Lub voj voog calibration rau cov ntsuas kub thiab av noo hauv cov chaw khaws cov khoom siv solder yog dab tsi?

11. Lub sijhawm siv ntau tshaj plaws ntawm cov tshuaj txhuam solder qhib rau ntawm lub tshuab luam ntawv yog dab tsi?

12. Yuav ua li cas thiaj txiav txim siab tau lub voj voog hloov pauv ntawm cov kua solder hauv lub tank soldering nthwv dej?

13. Kev sib raug zoo ntawm kev siv hlau solder thiab qhov loj ntawm cov solder sib koom ua ke hauv kev xaiv vuam yog dab tsi?

14. Qhov sib xyaw ua ke zoo tshaj plaws ntawm qhov kub ntawm lub taub hau soldering thiab lub sijhawm soldering hauv kev vuam tes yog dab tsi?

15. Lub kaum sab xis ntawm lub squeegee cuam tshuam li cas rau qhov zoo ntawm kev luam ntawv thaum lub sijhawm luam ntawv solder paste?

16. Yuav ua li cas thiaj nrhiav tau cov qhov khoob sab hauv hauv cov pob qij txha los ntawm X-Ray?

17. Cov xwm txheej txheem thiab qhov sib txawv ntawm kev tso cai rau kev sim viscosity ntawm cov tshuaj nplaum solder yog dab tsi?

18. Cov txheej txheem sim lub zog tensile thiab cov qauv tsim nyog rau cov pob qij txha solder yog dab tsi?

19. Yuav ua li cas los txheeb xyuas cov qauv ntawm cov pob qij txha los ntawm kev faib cov metallographic?

20. Tus qauv ntsuas kev huv ntawm cov ion rau cov seem flux yog dab tsi?

21. Qhov kub ntawm qhov kev ua ntej ntawm kev rov ua dua soldering cuam tshuam li cas rau kev vuam?

22. Hauv cov txheej txheem ob lub nthwv dej soldering, lub luag haujlwm thiab cov chaw teeb tsa ntawm nthwv dej pem hauv ntej thiab nthwv dej rov qab yog dab tsi?

23. Yuav ua li cas kom txo tau qhov tawg ntawm cov tshuaj nplaum los ntawm kev ua kom zoo dua qhov tsim qauv qhib stencil?

24. Qhov cuam tshuam ntawm kev tiv thaiv nitrogen rau qhov zoo ntawm kev vuam hauv kev xaiv vuam yog dab tsi?

25. Yuav ua li cas kho qhov reflow soldering txias raws li PCB thickness?

26. Lub hauv paus ntsiab lus sib phim ntawm qhov ceev ntawm kev luam ntawv thiab qhov viscosity ntawm cov tshuaj nplaum solder yog dab tsi?

27. Kev sib raug zoo ntawm tus naj npawb ntawm cov cheeb tsam kub reflow soldering thiab kev vuam ntawm lub rooj tsavxwm sib txuas yog dab tsi?

28. Qhov cuam tshuam ntawm lub cuab yeej nplawm hauv lub tank soldering nthwv dej ntawm qhov sib xws ntawm cov kua solder yog dab tsi?

29. Qhov cuam tshuam ntawm qhov tseeb ntawm cov tshuaj tsuag tin ntawm lub nozzle vuam xaiv rau ntawm cov pob qij txha me me yog dab tsi?

30. Qhov kev tswj hwm qhov nro rau lub tshuab pub hlau solder yog dab tsi?

31. Cov txheej txheem txheem thiab cov kev ceev faj rau kev siv cov hlau tsis muaj lead rov qab yog dab tsi?

32. Cov khoom tseem ceeb ntawm cov pa roj uas hloov pauv tau yooj yim thiab lawv cov kev txwv rau kev ua haujlwm yog dab tsi?

33. Cov cai faib cov khib nyiab phom sij thiab cov kev cai pov tseg rau cov khoom siv solder pov tseg yog dab tsi?

34. Cov kev cai ntawm qib tiv thaiv kev tawg rau cov chaw khaws cov khoom siv solder yog dab tsi?

35. Yuav ua li cas thiaj tiv thaiv tau qhov oxidation theem ob ntawm cov solder dross thaum lub sijhawm khaws cia?

36. Yuav ua li cas thiaj li txo tau cov nqi los ntawm kev ua kom zoo dua cov tuab ntawm cov ntawv luam tawm solder paste?

37. Tus nqi poob nruab nrab ntawm kev lag luam ntawm cov hlau nplaum thiab kev ntsuas txo qis yog dab tsi?

38. Lub kaw lus ntsuas kev ua tau zoo ntawm cov khoom siv solder los ntawm ntau hom yog dab tsi?

39. Yuav ua li cas thiaj txo tau cov dej khib nyiab los ntawm kev ua kom zoo dua qub?

40. Kev sib raug zoo ntawm kev hloov pauv ntawm cov khoom muag solder thiab kev ua haujlwm peev yog dab tsi?

41. Cov txheej txheem tseem ceeb twg yuav tsum tau tsom mus rau thaum lub sijhawm kuaj xyuas daim ntawv pov thawj ISO 9001 ntawm cov neeg muab khoom siv solder?

42. Yuav ua li cas los ntsuam xyuas lub peev xwm R&D ntawm tus neeg muag khoom los ntawm kev tshuaj xyuas hauv chaw?

43. Yuav ua li cas txiav txim siab qhov piv txwv zoo ntawm cov khoom siv solder?

44. Cov kev cai tseem ceeb twg yuav tsum muaj nyob rau hauv daim ntawv cog lus nrog cov neeg muab khoom siv solder?

45. Yuav ua li cas los tswj cov ntaub ntawv ntawm cov khoom siv solder los ntawm kev siv lub tshuab nrhiav tau zoo?

46. ​​Cov hom squeegees sib txawv ua li cas rau kev luam ntawv zoo?

47. Yuav ua li cas los ntsuas qhov ua tau zoo ntawm cov txheej txheem tswj hwm solder?

48. Yuav ua li cas thiaj daws tau qhov teeb meem los ntawm qhov pom ntawm cov khoom siv solder thaum 大面积虚焊 (kev soldering tsis txaus) tshwm sim tom qab PCBA vuam?

49. Yuav ua li cas xaiv cov ntaub ntawv solder tsim nyog rau kev txheeb xyuas thaum lub sijhawm PCBA me me-kev sim ua khoom?

50. Yuav ua li cas los ntsuam xyuas qhov cuam tshuam ntawm qhov chaw cia khoom siv solder rau nws lub neej txee?

51. Yuav ua li cas txiav txim siab seb puas yuav hloov lub dab da dej solder thaum lub sijhawm kho lub tank soldering tsis tu ncua?

52. Yuav ua li cas thiaj ua kom cov phiaj xwm yuav khoom zoo dua los ntawm kev siv cov ntaub ntawv loj los tshuaj xyuas hauv kev tswj cov khoom siv solder?

53. Qhov cuam tshuam ntawm kev siv ntau hom kev kho dua tshiab rau kev ntseeg tau ntawm cov khoom thaum lub sijhawm PCBA rov ua haujlwm yog dab tsi?

46. Cov hom squeegees sib txawv ua li cas rau kev luam ntawv zoo?