Pawg Module

pcb ceev ceev

1. Cov cai tswjfwm rau cov laug cam PCB ceev ceev yog dab tsi?

Nws yog ib qho tsim nyog yuav tsum ua raws li kev tswj hwm sib npaug (qhov yuam kev hauv ± 5mil), kev sib phim impedance (50Ω / 75Ω ib txwm muaj), thiab 3W spacing principle (3 zaug ntawm txoj kab dav rau kev tiv thaiv crosstalk).
2. Yuav ua li cas thiaj txo tau qhov kev cuam tshuam ntawm cov teeb liab hauv cov PCBs ceev ceev?

Txo qhov kev cuam tshuam ntawm lub teeb liab los ntawm kev xaus cov resistors sib phim (series ntawm qhov chaw lossis parallel ntawm qhov kawg), tswj qhov impedance tas mus li ntawm qhov trace, thiab zam cov kab ntawm lub kaum sab xis (kev cuam tshuam nce ntxiv 30%).
3. Lub teeb liab sib txawv hauv cov PCBs ceev ceev yog dab tsi?

Ua los ntawm ob kab teeb liab uas ntev sib npaug, nrug sib npaug, thiab polarity sib txawv, nws muaj peev xwm tiv thaiv kev cuam tshuam zoo thiab qhov piv txwv tsis lees txais hom sib xws tshaj 40dB.
4. Qhov cuam tshuam ntawm vias rau cov teeb liab hauv cov PCBs ceev ceev yog dab tsi?

Nws qhia txog parasitic capacitance (kwv yees li 0.5pF) thiab inductance (kwv yees li 1nH). Cov txheej txheem rov qab-drilling raug pom zoo kom txo qhov ntev ntawm stub.
5. Yuav tsim cov pawg ntawm cov PCBs ceev ceev li cas?

Feem ntau siv 4-16 txheej, txheej fais fab thiab txheej av tau sib txuas zoo, thiab lub dielectric thickness raug tswj ntawm 0.1-0.3 hli kom ntseeg tau tias impedance stability.
6. Qhov txwv siab tshaj plaws ntawm kev ceev ntawm cov PCBs ceev ceev yog dab tsi?

Nws nyob ntawm qhov dav ntawm kab / qhov sib nrug (xws li 0.1mm / 0.1mm), thiab qhov ceev ntawm txoj kab hauv thaj chaw BGA tuaj yeem ncav cuag 100-150 kab / cm².
7. Yuav ua li cas thiaj daws tau qhov teeb meem crosstalk hauv cov PCBs ceev ceev?

Ua kom cov kab sib nrug ntau dua, ntxig cov kab hauv av cais, thiab zam cov kab sib luag ntau dua 100mil, uas tuaj yeem txo cov lus sib tham ntau dua 50%.
8. Cov txiaj ntsig ntawm kev siv tshuab dig muag/faus ntawm cov PCBs ceev ceev yog dab tsi?

Nws txo qhov poob ntawm lub teeb liab (kwv yees li 3dB), txuag qhov chaw saum npoo, thiab ua rau kom muaj kev ceev ntawm txoj kev los ntawm 20% -30%.
9. Txoj kev xam impedance rau cov PCBs ceev ceev yog dab tsi?

Siv cov cuab yeej zoo li SI9000 los xam qhov impedance ntawm tus yam ntxwv raws li dielectric constant (FR4 txog 4.4), qhov dav ntawm kab, thiab dielectric thickness.
10. Yuav ua li cas cais cov txheej teeb liab thiab cov txheej fais fab hauv cov PCBs ceev ceev?

Siv tsawg kawg yog 0.1 hli dielectric txheej rau kev cais tawm, thiab tsis txhob hla thaj chaw faib thaum faib cov txheej fais fab.
11. Cov ntaub ntawv siv rau cov laug cam PCB ceev ceev yog dab tsi?

Cov ntaub ntawv siv zaus siab xws li Rogers 4350B (Dk=3.66, Df=0.004) thiab Isola FR408HR (Dk=3.8, Df=0.007).
12. Cov khoom sib txawv cuam tshuam li cas rau cov teeb liab ceev ceev?

Qhov dielectric tsis tu ncua (Dk) qis txo qhov kev ncua sij hawm xa mus, thiab qhov dielectric poob tangent qis (Df) txo qhov teeb liab attenuation (kev txo qhov poob ntawm 0.5dB ib 10GHz).
13. Cov kev cai ntawm tus nqi Tg rau cov ntaub ntawv PCB ceev ceev yog dab tsi?

Feem ntau, xav tau Tg≥150 ℃, thiab Tg≥170 ℃ rau kev vuam tsis muaj hlau txhuas kom ntseeg tau tias muaj kev ruaj khov ntawm qhov kub siab.
14. Kev nqus dej ntawm cov khoom siv PCB ceev ceev cuam tshuam li cas rau kev ua haujlwm?

Kev nqus dej yuav ua rau tus nqi Dk nce siab (kwv yees li 5%), ua rau kev xa xov teeb liab qeeb zuj zus. Yuav tsum xaiv cov khoom siv uas muaj tus nqi nqus dej
15. Tus qauv rau cov coefficient ntawm thermal expansion (CTE) ntawm cov ntaub ntawv PCB ceev ceev yog dab tsi?

Nws yuav tsum phim lub CTE ntawm lub chip (kwv yees li 6-10ppm/℃) kom tiv thaiv kev tawg ntawm cov khoom sib txuas los ntawm kev ntxhov siab thermal.
16. Yuav ua li cas xaiv hom ntawv ci tooj liab rau cov PCBs ceev ceev?

Rau cov ntawv thov siab zaus, xaiv RTF (rov kho dua) cov ntawv ci tooj liab nrog qhov roughness Ra
17. Cov kev cai ntawm qib tiv taus hluav taws rau cov ntaub ntawv PCB ceev ceev yog dab tsi?

Nws yuav tsum ua raws li tus qauv UL94 V-0 kom ntseeg tau tias muaj kev nyab xeeb hluav taws.
18. Qhov kub thiab txias ruaj khov ntawm lub dielectric tas li ntawm cov ntaub ntawv PCB ceev ceev puas tseem ceeb?

Thaum qhov kub hloov pauv los ntawm ± 20 ℃, qhov kev hloov pauv Dk yog
19. Yuav ua li cas thiaj li sib npaug tus nqi thiab kev ua tau zoo ntawm cov khoom siv PCB ceev ceev?

Cov khoom siv uas tsis tshua poob nyiaj muaj nqi siab. Xaiv cov khoom siv tsim nyog raws li qhov zaus ntawm lub teeb liab (xws li FR4 zoo dua rau qis dua 10GHz).
20. Yuav ua li cas txog kev tiv thaiv xeb tshuaj ntawm cov khoom siv PCB ceev ceev?

Nws yuav tsum tau tiv taus cov tshuaj xws li etchants thiab soldering fluxes, nrog rau qhov corrosion rate
21. Cov kauj ruam tseem ceeb hauv cov txheej txheem tsim cov PCB rigid boards ceev ceev yog dab tsi?

Drilling → plating → qauv hloov → etching → solder mask → kev kho qhov chaw (xws li immersion gold, OSP), nrog kev tswj hwm qhov tseeb ntawm ± 0.05 hli.
22. Cov kev cai rau cov tuab tooj liab electroplated hauv cov PCBs ceev ceev yog dab tsi?

Cov txheej teeb liab ≥18μm, thiab cov txheej fais fab ≥35μm kom ntseeg tau tias muaj peev xwm nqa tam sim no thiab kev ncaj ncees ntawm cov teeb liab.
23. Yuav ua li cas kom paub tseeb tias qhov tseeb ntawm cov PCBs ceev ceev?

Siv cov thev naus laus zis laser direct imaging (LDI) nrog kev kam rau siab ntawm kab dav ntawm ± 0.02 hli thiab qhov ntsuas etching ≥3.
24. Puas yog qhov tuab ntawm lub npog ntsej muag hauv cov PCBs ceev ceev cuam tshuam rau lub teeb liab?

Lub tuab ntawm lub npog ntsej muag solder yog 0.02-0.05 hli. Qhov tuab ntau dhau yuav cuam tshuam rau qhov impedance. Nws raug pom zoo kom qhib qhov rais rau cov kab teeb liab tseem ceeb.
25. Yuav ua li cas xaiv cov txheej txheem kho qhov chaw rau cov PCBs ceev ceev?

Rau cov teeb liab siab, xaiv cov kub immersion (Au txheej 0.05-0.1μm) lossis cov nyiaj kho qhov chaw nrog kev tiv tauj tsis kam
26. Cov ntsiab lus tseem ceeb ntawm BGA soldering txheej txheem rau high-speed PCBs yog dab tsi?

Qhov kub siab tshaj plaws ntawm kev rov ua dua tshiab yog 245-255 ℃, thiab lub sijhawm ua kua yog 60-90s kom ntseeg tau tias qhov tuab ntawm cov khoom sib koom ua ke IMC txheej yog 1-3μm.
27. Cov kev cai rau qhov tseeb ntawm qhov chaw ntawm cov khoom hauv cov PCBs ceev ceev yog dab tsi?

Qhov tseeb ntawm qhov chaw ntawm 0201 Cheebtsam yog ± 0.05 hli, thiab qhov sib txawv ntawm tus pin ntawm QFP cov khoom siv yog
28. Yuav ua li cas kom tsis txhob muaj cov khoom seem hauv cov txheej txheem ntxuav cov PCBs ceev ceev?

Siv cov dej los yog semi-aqueous ntxuav nrog cov ionic residues
29. Yuav ua li cas thiaj txo tau kev ntxhov siab hauv cov txheej txheem txiav vaj huam sib luag ntawm cov PCBs ceev ceev?

Siv milling lossis laser vaj huam sib luag txiav nrog kev ntxhov siab seem
30. Cov txheej txheem ci rau cov PCBs ceev ceev yog dab tsi?

Ci ntawm 120 ℃ rau 2-4 teev kom tshem tawm cov dej noo ntawm lub rooj tsavxwm thiab tiv thaiv lub rooj tsavxwm tawg thaum lub sijhawm soldering.
31. Yuav ua li cas thiaj ua tau qhov kev sim impedance ntawm cov laug cam PCB ceev ceev?

Siv lub tshuab ntsuas network (xws li Keysight N5244B) nrog qhov zaus sim ntawm 1-40GHz thiab qhov yuam kev ntawm ± 5%.
32. Cov txheej txheem kuaj xyuas kev ua haujlwm ntawm cov teeb liab rau cov PCBs ceev ceev yog dab tsi?

Kev ntsuam xyuas daim duab qhov muag (qhov siab qhov muag ≥80%, qhov dav qhov muag ≥70%), Kev ntsuam xyuas S-parameter (S11 -3dB).
33. Lub hom phiaj ntawm kev tshuaj xyuas X-Ray rau cov PCBs ceev ceev yog dab tsi?

Tshawb nrhiav cov qhov khoob sab hauv hauv BGA cov pob qij txha (qhov sib piv ntawm qhov khoob
34. Cov teeb meem dab tsi uas AOI tshuaj xyuas cov PCBs ceev ceev tuaj yeem pom?

Nws tuaj yeem ntes tau cov voj voog luv luv, cov voj voog qhib, qhov sib txawv ntawm qhov chaw ntawm cov khoom (qhov tseeb ± 0.02 hli), thiab qhov yuam kev polarity.
35. Cov kev cai rau kev xeem ICT ntawm cov PCBs ceev ceev yog dab tsi?

Qhov kev pab them nqi ntawm cov nodes tseem ceeb yog ≥95% kom ntseeg tau tias qhov kev sib txuas hluav taws xob raug.
36. Cov txiaj ntsig ntawm kev sim ya dav hlau rau cov PCBs ceev ceev yog dab tsi?

Tsis tas yuav muaj khoom siv, nws tuaj yeem sim cov PCBs uas muaj qhov ceev ceev, thiab qhov ceev ntawm kev sim yog 50-100 cov ntsiab lus ib feeb.
37. Cov khoom siv sim kev ntseeg siab ib puag ncig rau cov PCBs ceev ceev yog dab tsi?

Kub thiab av noo siab (85℃/85% RH, 1000h), thermal shock (-40℃~125℃, 1000 cycles).
38. Tus qauv ntsuas kev tiv thaiv rwb thaiv tsev rau cov PCBs ceev ceev yog dab tsi?

Lub zog ntsuas yog 500V, thiab qhov tsis kam ntawm rwb thaiv tsev yog ≥10GΩ kom ntseeg tau tias muaj kev rho tawm cov teeb liab.
39. Cov kev cai rau kev sim voltage ntawm cov PCBs ceev ceev yog dab tsi?

Lub zog ntsuas yog 1000V rau 1 feeb yam tsis muaj kev tawg lossis flashover.
40. Txoj kev sim solderability rau cov PCBs ceev ceev yog dab tsi?

Raus rau hauv lub cub tawg tin 235 ℃, nrog lub sijhawm ntub 95%.
41. Cov laj thawj rau qhov ua rau muaj teeb liab ntau dhau hauv cov laug cam PCB ceev ceev yog dab tsi?

Kev poob khoom loj heev, impedance mismatch, cov kab ntev dhau (attenuation nce 2dB txhua 10cm), thiab ntau dhau vias.
42. Yuav ua li cas thiaj daws tau qhov teeb meem ntawm kev cuam tshuam ntau dhau ntawm cov teeb liab hauv cov PCBs ceev ceev?

Txhim kho cov resistors termination, kho qhov trace topology, thiab txo cov naj npawb ntawm vias thiab connectors.
43. Yuav ua li cas thiaj daws tau qhov teeb meem loj heev hauv cov PCBs ceev ceev?

Ntxiv ib txheej tiv thaiv, kho qhov kev taw qhia ntawm txoj kab, thiab ntxig cov kab hauv av kom txo qhov crosstalk los ntawm 30% -50%.
44. Yuav ua li cas thiaj li txo tau lub suab nrov ntawm lub hwj chim hauv cov PCBs ceev ceev?

Ua kom cov decoupling capacitors (0.1μF + 10μF ua ke), ua kom zoo dua qhov kev teeb tsa ntawm cov txheej fais fab, thiab ua kom txoj kev muab fais fab luv dua.
45. Vim li cas BGA solder joint tawg hauv high-speed PCBs?

Kev ntxhov siab thermal ntau dhau, CTE mismatch, soldering kub tsis raug, thiab qhov rov ua haujlwm yuav tsum
46. Yuav ua li cas thiaj nrhiav tau qhov qhib thiab luv luv ntawm cov teeb meem hauv cov PCBs ceev ceev?

Siv lub tshuab ntsuas ya lossis lub micro-ohmmeter uas muaj qhov tseeb txog li 0.1mΩ thiab qhov chaw nyob
47. Cov yam ntxwv ntawm kev siv cov PCB rigid boards ceev ceev hauv 5G kev sib txuas lus yog dab tsi?

Txhawb nqa millimeter-wave zaus bands (24-40GHz), qis poob (poob
48. Cov kev cai thov rau cov PCBs ceev ceev hauv cov chaw khaws ntaub ntawv yog dab tsi?

Tus nqi xa tawm ntawm 100Gbps+, lub teeb liab zoo, thiab kev txhawb nqa rau high-density interconnect (HDI) technology.
49. Cov ntsiab lus tseem ceeb ntawm cov PCBs ceev ceev hauv cov servers yog dab tsi?

Ntau txheej fais fab, cov backplanes ceev ceev (poob
50. Cov teeb meem ntawm kev txuas hluav taws xob ntawm cov PCBs ceev ceev hauv GPUs yog dab tsi?

Kev tswj cov ntaub ntawv loj heev (bandwidth 1TB/s+), xav tau kev tswj hwm crosstalk thiab kev ncua sijhawm, nrog rau qhov ceev ntawm cov xov hlau tshaj 200 traces/cm².
51. Cov kev cai ntawm kev ntseeg tau rau cov PCBs ceev ceev hauv cov khoom siv hluav taws xob hauv tsheb yog dab tsi?

Kev ua haujlwm kub ntawm -40 ℃ ~ 125 ℃, dhau daim ntawv pov thawj AEC-Q100, thiab lub neej ua haujlwm ntau tshaj 15 xyoos.
52. Cov kev cai tshwj xeeb rau cov PCBs ceev ceev hauv kev tsav dav hlau yog dab tsi?

Tsim qauv sib dua (qhov ceev 100,000 teev), thiab tiv taus hluav taws xob.
53. Cov lus qhia tsim qauv rau cov PCBs ceev ceev hauv cov khoom siv kho mob yog dab tsi?

Ua raws li cov qauv kev nyab xeeb hluav taws xob kho mob (IEC 60601), nrog rau kev cuam tshuam teeb liab
54. Cov kev ntsuas tiv thaiv kev cuam tshuam rau cov PCBs ceev ceev hauv kev tswj hwm kev lag luam yog dab tsi?

Ntxiv cov khaubncaws sab nraud povtseg cais, siv cov khoom sib txuas uas muaj kev tiv thaiv, ua kom cov kab ke hauv av zoo dua, nrog rau kev tiv thaiv kev cuam tshuam tau txhim kho los ntawm 40%.
55. Yuav ua li cas los tswj cov nqi rau cov PCBs ceev ceev hauv cov khoom siv hluav taws xob?

Siv cov ntaub ntawv ib txwm muaj (xws li FR4), ua kom cov txheej txheem yooj yim dua, thiab ua kom cov qauv tsim zoo dua, nrog rau cov nqi txo los ntawm 20% -30%.
56. Kev tsim qauv thermal ntawm cov PCBs ceev ceev hauv cov chaw sib txuas lus yog dab tsi?

Siv cov PCBs ua los ntawm hlau lossis thermal via arrays, nrog rau kev tiv thaiv thermal txo qis 30% thiab qhov kub ntawm qhov chaw
57. Cov software twg feem ntau siv rau kev sim ua cim ntawm cov laug cam PCB ceev ceev?

Ansys HFSS, Cadence Sigrity, ADS, nrog qhov yuam kev ntawm kev simulation
58. Yuav ua li cas thiaj ua tau qhov kev sim ua kom muaj zog rau cov PCBs ceev ceev?

Tsim ib lub qauv fais fab network thiab tshuaj xyuas lub suab nrov fais fab (ripple
59. Cov kev teeb tsa parameter rau kev sim ua kom muaj kev ncaj ncees ntawm cov PCBs ceev ceev yog dab tsi?

Lub sijhawm nce ntawm lub teeb liab nkag (
60. Yuav ua li cas teeb tsa crosstalk simulation rau cov PCBs ceev ceev?

Txhais cov chaw cuam tshuam thiab cov kab raug tsim txom, teeb tsa qhov sib nrug thiab ntev, nrog rau qhov tshwm sim simulation thiab qhov yuam kev ntsuas
61. Lub hom phiaj ntawm S-parameter simulation rau high-speed PCBs yog dab tsi?

Kev tshuaj xyuas qhov poob ntawm kev xa xov teeb liab (S21) thiab kev cuam tshuam (S11) los ntsuam xyuas kev ua haujlwm ntawm lub kaw lus.
62. Cov txheej txheem simulation suab nrov ntawm lub zog rau cov PCBs ceev ceev yog dab tsi?

Siv lub sijhawm-domain lossis qhov zaus-domain simulation, tsom mus rau suab nrov hauv 100kHz-100MHz zaus band.
63. EMI simulation ntawm high-speed PCBs tuaj yeem kwv yees li cas?

Kwv yees qhov muaj zog ntawm cov hluav taws xob (
64. Yuav ua li cas teem cov xwm txheej ciam teb rau kev sim ua kom sov ntawm cov PCBs ceev ceev?

Teem qhov kub thiab txias, cov coefficient ntawm kev tso cua sov tawm, thiab kev siv hluav taws xob, nrog rau qhov yuam kev faib tawm thermal
65. Yuav ua li cas los txheeb xyuas qhov sib txawv ntawm cov txiaj ntsig simulation thiab kev ntsuas tiag tiag ntawm cov PCBs ceev ceev?

Piv txwv qhov impedance, daim duab qhia qhov muag, thiab S-parameters, thiab tshuaj xyuas cov ua rau muaj qhov sib txawv (xws li cov parasitic parameters thiab cov txheej txheem yuam kev).
66. Cov txiaj ntsig ntawm kev sim ntau lub cev rau cov PCBs ceev ceev yog dab tsi?

Kev tshuaj xyuas dav dav ntawm cov teeb liab, lub zog, thermal, thiab kev ua haujlwm ntawm lub tshuab, nrog rau kev tsim qauv zoo tshaj plaws tau txhim kho los ntawm 40%.
67. Cov qauv thoob ntiaj teb rau cov laug cam PCB ceev ceev yog dab tsi?

IPC-6012 (cov lus qhia txog kev ua haujlwm ntawm daim ntawv luam tawm), IEEE 802.3 (cov qauv Ethernet), JEDEC (cov qauv ntim khoom).
68. Cov qauv kev lag luam hauv tsev rau cov PCBs ceev ceev yog dab tsi?

GB/T 4588 (cov lus qhia dav dav rau cov laug cam luam tawm), SJ/T 11364 (kev tswj kev ua qias tuaj rau cov khoom siv hluav taws xob).
69. Cov ntsiab lus tseem ceeb ntawm cov qauv tsim rau cov PCBs ceev ceev yog dab tsi?

Xws li kev tswj hwm impedance, cov cai ntawm cov xov hlau, kev tsim cov txheej txheem, EMC cov kev cai, thiab lwm yam, tag nrho muaj 12 pawg tseem ceeb ntawm cov lus qhia.
70. Cov qauv kev lees txais rau kev tsim khoom rau cov PCBs ceev ceev yog dab tsi?

Kev kam rau siab ntawm kab dav ± 10%, qhov txoj kab uas hla ntawm qhov kam rau siab ± 0.05 hli, qhov roughness ntawm qhov chaw Ra
71. Cov qauv ib puag ncig uas yuav tsum tau ua rau cov PCBs ceev ceev yog dab tsi?

Ua raws li RoHS 2.0 (txwv tsis pub muaj 6 yam khoom txaus ntshai), REACH (tswj 224 yam khoom).
72. Cov ntawv pov thawj kev nyab xeeb rau cov PCBs ceev ceev yog dab tsi?

Yuav tsum tau dhau UL, CE, FCC daim ntawv pov thawj kom ntseeg tau tias muaj kev nyab xeeb hluav taws xob thiab kev sib raug zoo ntawm electromagnetic.
73. Lub kaw lus tswj xyuas kev lag luam zoo rau cov PCBs ceev ceev yog dab tsi?

Ua raws li ISO 9001 kev tswj hwm zoo, nrog rau cov txheej txheem muaj peev xwm CPK ≥1.33.
74. Cov kev cai tshwj xeeb ntawm cov qauv tub rog rau cov PCBs ceev ceev yog dab tsi?

Ua raws li GJB 362B (cov lus qhia dav dav rau cov laug cam luam tawm), nrog rau cov kev cai hloov pauv ib puag ncig uas nruj dua.
75. Cov qauv kev cai lij choj rau kev lag luam kho mob rau cov PCBs ceev ceev yog dab tsi?

Ua raws li ISO 13485 (kev tswj hwm zoo rau cov khoom siv kho mob), nrog rau 100% kev taug qab qhov yuav tsum tau ua.
76. Cov qauv kev cai ntawm kev lag luam tsheb rau cov PCBs ceev ceev yog dab tsi?

Ua raws li IATF 16949, nrog rau qhov kev tsim nyog ntawm cov khoom sib xws ≥99.5%.
77. Cov qauv kev siv tshuab yav tom ntej ntawm cov laug cam PCB ceev ceev yog dab tsi?

Cov zaus siab dua (terahertz zaus bands), qis dua poob (Df
78. AI pab tsim PCB sai li cas?

AI ua kom cov xov hlau zoo dua (kev ua haujlwm nce 60%), kwv yees cov teeb meem kev ncaj ncees ntawm lub teeb liab, thiab tsim cov cai tsim qauv ntse.
79. Yuav ua li cas thiaj siv tau 3D printing technology rau high-speed PCBs?

Kev paub txog kev tsim khoom sai ntawm cov qauv nyuaj nrog qhov tseeb ntawm 0.1 hli thiab txo tus nqi ntawm 30%.

pcb ceev ceev

1. Cov cai tswjfwm rau cov laug cam PCB ceev ceev yog dab tsi?

2. Yuav ua li cas thiaj txo tau qhov kev cuam tshuam ntawm cov teeb liab hauv cov PCBs ceev ceev?

3. Lub teeb liab sib txawv hauv cov PCBs ceev ceev yog dab tsi?

4. Qhov cuam tshuam ntawm vias rau cov teeb liab hauv cov PCBs ceev ceev yog dab tsi?

5. Yuav tsim cov pawg ntawm cov PCBs ceev ceev li cas?

6. Qhov txwv siab tshaj plaws ntawm kev ceev ntawm cov PCBs ceev ceev yog dab tsi?

7. Yuav ua li cas thiaj daws tau qhov teeb meem crosstalk hauv cov PCBs ceev ceev?

8. Cov txiaj ntsig ntawm kev siv tshuab dig muag/faus ntawm cov PCBs ceev ceev yog dab tsi?

9. Txoj kev xam impedance rau cov PCBs ceev ceev yog dab tsi?

10. Yuav ua li cas cais cov txheej teeb liab thiab cov txheej fais fab hauv cov PCBs ceev ceev?

11. Cov ntaub ntawv siv rau cov laug cam PCB ceev ceev yog dab tsi?

12. Cov khoom sib txawv cuam tshuam li cas rau cov teeb liab ceev ceev?

13. Cov kev cai ntawm tus nqi Tg rau cov ntaub ntawv PCB ceev ceev yog dab tsi?

14. Kev nqus dej ntawm cov khoom siv PCB ceev ceev cuam tshuam li cas rau kev ua haujlwm?

15. Tus qauv rau cov coefficient ntawm thermal expansion (CTE) ntawm cov ntaub ntawv PCB ceev ceev yog dab tsi?

16. Yuav ua li cas xaiv hom ntawv ci tooj liab rau cov PCBs ceev ceev?

17. Cov kev cai ntawm qib tiv taus hluav taws rau cov ntaub ntawv PCB ceev ceev yog dab tsi?

18. Qhov kub thiab txias ruaj khov ntawm lub dielectric tas li ntawm cov ntaub ntawv PCB ceev ceev puas tseem ceeb?

19. Yuav ua li cas thiaj li sib npaug tus nqi thiab kev ua tau zoo ntawm cov khoom siv PCB ceev ceev?

20. Yuav ua li cas txog kev tiv thaiv xeb tshuaj ntawm cov khoom siv PCB ceev ceev?

21. Cov kauj ruam tseem ceeb hauv cov txheej txheem tsim cov PCB rigid boards ceev ceev yog dab tsi?

22. Cov kev cai rau cov tuab tooj liab electroplated hauv cov PCBs ceev ceev yog dab tsi?

23. Yuav ua li cas kom paub tseeb tias qhov tseeb ntawm cov PCBs ceev ceev?

24. Puas yog qhov tuab ntawm lub npog ntsej muag hauv cov PCBs ceev ceev cuam tshuam rau lub teeb liab?

25. Yuav ua li cas xaiv cov txheej txheem kho qhov chaw rau cov PCBs ceev ceev?

26. Cov ntsiab lus tseem ceeb ntawm BGA soldering txheej txheem rau high-speed PCBs yog dab tsi?

27. Cov kev cai rau qhov tseeb ntawm qhov chaw ntawm cov khoom hauv cov PCBs ceev ceev yog dab tsi?

28. Yuav ua li cas kom tsis txhob muaj cov khoom seem hauv cov txheej txheem ntxuav cov PCBs ceev ceev?

29. Yuav ua li cas thiaj txo tau kev ntxhov siab hauv cov txheej txheem txiav vaj huam sib luag ntawm cov PCBs ceev ceev?

30. Cov txheej txheem ci rau cov PCBs ceev ceev yog dab tsi?

31. Yuav ua li cas thiaj ua tau qhov kev sim impedance ntawm cov laug cam PCB ceev ceev?

32. Cov txheej txheem kuaj xyuas kev ua haujlwm ntawm cov teeb liab rau cov PCBs ceev ceev yog dab tsi?

33. Lub hom phiaj ntawm kev tshuaj xyuas X-Ray rau cov PCBs ceev ceev yog dab tsi?

34. Cov teeb meem dab tsi uas AOI tshuaj xyuas cov PCBs ceev ceev tuaj yeem pom?

35. Cov kev cai rau kev xeem ICT ntawm cov PCBs ceev ceev yog dab tsi?

36. Cov txiaj ntsig ntawm kev sim ya dav hlau rau cov PCBs ceev ceev yog dab tsi?

37. Cov khoom siv sim kev ntseeg siab ib puag ncig rau cov PCBs ceev ceev yog dab tsi?

38. Tus qauv ntsuas kev tiv thaiv rwb thaiv tsev rau cov PCBs ceev ceev yog dab tsi?

39. Cov kev cai rau kev sim voltage ntawm cov PCBs ceev ceev yog dab tsi?

40. Txoj kev sim solderability rau cov PCBs ceev ceev yog dab tsi?

41. Cov laj thawj rau qhov ua rau muaj teeb liab ntau dhau hauv cov laug cam PCB ceev ceev yog dab tsi?

42. Yuav ua li cas thiaj daws tau qhov teeb meem ntawm kev cuam tshuam ntau dhau ntawm cov teeb liab hauv cov PCBs ceev ceev?

43. Yuav ua li cas thiaj daws tau qhov teeb meem loj heev hauv cov PCBs ceev ceev?

44. Yuav ua li cas thiaj li txo tau lub suab nrov ntawm lub hwj chim hauv cov PCBs ceev ceev?

45. Vim li cas BGA solder joint tawg hauv high-speed PCBs?

46. ​​Yuav ua li cas thiaj nrhiav tau qhov qhib thiab luv luv ntawm cov teeb meem hauv cov PCBs ceev ceev?

47. Cov yam ntxwv ntawm kev siv cov PCB rigid boards ceev ceev hauv 5G kev sib txuas lus yog dab tsi?

48. Cov kev cai thov rau cov PCBs ceev ceev hauv cov chaw khaws ntaub ntawv yog dab tsi?

49. Cov ntsiab lus tseem ceeb ntawm cov PCBs ceev ceev hauv cov servers yog dab tsi?

50. Cov teeb meem ntawm kev txuas hluav taws xob ntawm cov PCBs ceev ceev hauv GPUs yog dab tsi?

51. Cov kev cai ntawm kev ntseeg tau rau cov PCBs ceev ceev hauv cov khoom siv hluav taws xob hauv tsheb yog dab tsi?

52. Cov kev cai tshwj xeeb rau cov PCBs ceev ceev hauv kev tsav dav hlau yog dab tsi?

53. Cov lus qhia tsim qauv rau cov PCBs ceev ceev hauv cov khoom siv kho mob yog dab tsi?

54. Cov kev ntsuas tiv thaiv kev cuam tshuam rau cov PCBs ceev ceev hauv kev tswj hwm kev lag luam yog dab tsi?

55. Yuav ua li cas los tswj cov nqi rau cov PCBs ceev ceev hauv cov khoom siv hluav taws xob?

56. Kev tsim qauv thermal ntawm cov PCBs ceev ceev hauv cov chaw sib txuas lus yog dab tsi?

57. Cov software twg feem ntau siv rau kev sim ua cim ntawm cov laug cam PCB ceev ceev?

58. Yuav ua li cas thiaj ua tau qhov kev sim ua kom muaj zog rau cov PCBs ceev ceev?

59. Cov kev teeb tsa parameter rau kev sim ua kom muaj kev ncaj ncees ntawm cov PCBs ceev ceev yog dab tsi?

60. Yuav ua li cas teeb tsa crosstalk simulation rau cov PCBs ceev ceev?

61. Lub hom phiaj ntawm S-parameter simulation rau high-speed PCBs yog dab tsi?

62. Cov txheej txheem simulation suab nrov ntawm lub zog rau cov PCBs ceev ceev yog dab tsi?

63. EMI simulation ntawm high-speed PCBs tuaj yeem kwv yees li cas?

64. Yuav ua li cas teem cov xwm txheej ciam teb rau kev sim ua kom sov ntawm cov PCBs ceev ceev?

65. Yuav ua li cas los txheeb xyuas qhov sib txawv ntawm cov txiaj ntsig simulation thiab kev ntsuas tiag tiag ntawm cov PCBs ceev ceev?

66. Cov txiaj ntsig ntawm kev sim ntau lub cev rau cov PCBs ceev ceev yog dab tsi?

67. Cov qauv thoob ntiaj teb rau cov laug cam PCB ceev ceev yog dab tsi?

68. Cov qauv kev lag luam hauv tsev rau cov PCBs ceev ceev yog dab tsi?

69. Cov ntsiab lus tseem ceeb ntawm cov qauv tsim rau cov PCBs ceev ceev yog dab tsi?

70. Cov qauv kev lees txais rau kev tsim khoom rau cov PCBs ceev ceev yog dab tsi?

71. Cov qauv ib puag ncig uas yuav tsum tau ua rau cov PCBs ceev ceev yog dab tsi?

72. Cov ntawv pov thawj kev nyab xeeb rau cov PCBs ceev ceev yog dab tsi?

73. Lub kaw lus tswj xyuas kev lag luam zoo rau cov PCBs ceev ceev yog dab tsi?

74. Cov kev cai tshwj xeeb ntawm cov qauv tub rog rau cov PCBs ceev ceev yog dab tsi?

75. Cov qauv kev cai lij choj rau kev lag luam kho mob rau cov PCBs ceev ceev yog dab tsi?

76. Cov qauv kev cai ntawm kev lag luam tsheb rau cov PCBs ceev ceev yog dab tsi?

77. Cov qauv kev siv tshuab yav tom ntej ntawm cov laug cam PCB ceev ceev yog dab tsi?

78. AI pab tsim PCB sai li cas?

79. Yuav ua li cas thiaj siv tau 3D printing technology rau high-speed PCBs?

46. Yuav ua li cas thiaj nrhiav tau qhov qhib thiab luv luv ntawm cov teeb meem hauv cov PCBs ceev ceev?