Nzira yekuziva sei zvikanganiso zvisingaoneki zvePCBA zvakajeka?
Maitiro Ekuongorora X-RAY
1. Majoini eBGA solder haana kukanganiswa:
Maitiro ekutonga: anogamuchirwa kana offset iri pasi pehafu yedenderedzwa re solder pad; Kana offset yakakura kupfuura kana yakaenzana nehafu yedenderedzwa re solder pad, inofanira kurambwa.
2. Majoini eBGA solder haana short circuit:
Zviyero zvekutonga: Kana pasina kubatana kwesimbi pakati pemajoini esimbi, zvinogamuchirwa; Kana paine kubatana kwesimbi pakati pemajoini esimbi, inofanira kurambwa.
3. Majoini eBGA solder asina maburi:
Zvinodiwa pakutonga: Nzvimbo isina chinhu iri pasi pe20% yenzvimbo yese yejoini yekusonesa inogamuchirwa; Kana nzvimbo isina chinhu yakakura kupfuura kana kuti yakaenzana ne20% yenzvimbo yese yejoini yekusonesa, inofanira kurambwa.
4. Hapana kushomeka kwetin mumajoini eBGA solder:
Zvinodiwa pakusarudza: Gamuchira kana mabhora ese esimbi achiratidza saizi dzakazara, dzakafanana uye dzakafanana; Kana saizi yebhora resimbi iri diki zvakanyanya kana tichienzanisa nemamwe mabhora esimbi akaripoteredza, rinofanira kurambwa.
5. Muyero wekuongorora weE-PAD yegrounding pad yemachipisi eQFP/QFN emhando yezvimwe zvigadzirwa ndewekuti nzvimbo yetin inofanira kunge yakakura kupfuura 60% yenzvimbo yese (magrid mana akabatanidzwa pamwe chete anoratidza kusungirirwa kwakanaka), uye chiyero chesampuli i20%.
1. Chinangwa chekuedza: Mabhodhi ePCBA ane BGA/LGA uye zvikamu zvepasi;
2. Kuwanda kwekuyedza:
① Mushure mekushandurwa, vashandi vehunyanzvi vanosimbisa kana bhodhi rekutanga rekunamira resolder neBGA surface mount zvine zvikanganiso zvekutsauka, uye vozoenderera mberi nekupinda mukamuri mushure mekusimbisa kuti hapana matambudziko;
② Vashandi vehunyanzvi vanosimbisa kana paine matambudziko neBGA soldering yebhodhi rekutanga rekunamira mushure mekupfuura nemukamuri, uye vozoriisa mukugadzirwa kana pasina matambudziko;
③ Munguva yekugadzira yakajairika, vashandi vakasarudzwa ndivo vane basa rekuyedza, uye kana maodha e≤ 100pcs, 100% anofanira kuongororwa zvizere; 101-1000pcs anofanira kutorwa sampuli ye30%, maodha anopfuura 1001pcs anofanira kutorwa sampuli ye20%;
④ Munguva yekugadzira yakajairika, IPQC inoita bvunzo dzesampuli pazvidimbu zviviri zvikuru paawa;
⑤ Zvigadzirwa zvinofanirwa kuongororwa zvizere uye mapikicha anofanira kuchengetwa zvizere.
3. Kana paine zvikanganiso, mapikicha anofanira kuchengetwa, uye modhi yeBOM, nhamba yebhacode serial uye mhedzisiro yebvunzo yechigadzirwa chakaedzwa zvinofanirwa kunyorwa muX-Ray Test Record Form. Wedzera mifananidzo inosonererwa yeQFP neQFN grounding pads, uye chengetedza 100% yemifananidzo.
4. Kana paine zvikanganiso panguva yekuedzwa, zvinofanira kuziviswa nekukasika kumukuru wechikoro uye kuinjiniya wekugadzirisa kuti zvisimbiswe.
Nyanzvi yekuongorora yeX-ray yeindasitiri ine hungwaru
Sisitimu yemidziyo yeX-RAY inonyanya kuve nezvikamu zvinomwe: micro focus X-ray source, imaging unit, computer image processing system, mechanical system, electrical control system, safety protection system uye yambiro. Inobatanidza kuyedza kusingaparadze, computer software technology, image acquisition & processing technology uye mechanical transmission technology, ichibatanidza nzvimbo ina huru dzehunyanzvi dze optical, mechanical, electrical uye digital image processing. Kuburikidza nekusiyana kwe X-rays nezvinhu zvakasiyana, chimiro chemukati chechinhu chinotorwa mifananidzo uye internal defect detection inoitwa. Mufananidzo wekuona chigadzirwa unogona kuonekwa munguva chaiyo kuti uone kana paine defects, types defects uye indasitiri standard levels mukati mechigadzirwa. Panguva imwe chete, computer image processing system inoshandiswa kuchengetedza nekugadzirisa mifananidzo kuti ivandudze kujeka kwemufananidzo uye kuve nechokwadi chekuti kuongororwa kwakarurama. Inogona kuyera otomatiki mabubbles pazvikamu zvemagetsi zvakaputirwa zvakaita seBGA neQFN, uye inotsigira zviyero zvejometri zvakaita sedaro, angle, dhayamita, uye polygon. Inogona kuwana nyore nyore multi-point positioning detection, zvichibvumira zvigadzirwa kuti zvibve mufekitori zvisina defects.
