Kubva kutanga kwema1950, yakadhindwa redunhu bhodhi (PCB) yanga iri yekutanga moduli yekuvaka yemagetsi kurongedza, semutakuri weakasiyana emagetsi emagetsi uye hubhu yekutenderera chiratidzo chedunhu, hunhu hwayo uye kuvimbika kunotaridza kunaka uye kuvimbika kwese kwemagetsi kurongedza. Iine miniaturization, lightweight uye multi-function zvinodiwa zvezvigadzirwa zvemagetsi, pamwe nekusimudzirwa kwe lead-isina uye halogen-isina maitiro, izvo zvinodikanwa zvePCB kuvimbika zvichave zvakakwirira nepamusoro. Naizvozvo, nzira yekukurumidza kutsvaga matambudziko ekuvimbika kwePCB uye kuita inowirirana kuvimbika kuvandudzwa yave imwe yenyaya dzakakosha kumabhizinesi ePCB.

Zvakajairwa PCB kuvimbika matambudziko uye akajairwa ngano

Murombo solderability

(Hapana kunyorova)

Kusaita solderability (kwete-wetting)

Virtual welding

(Pillow effect)

Murombo anotsamira

Layered plate blasting

Vhura dunhu (kuburikidza neburi)

Vhura dunhu

(Laser bofu gomba)

Vhura dunhu

Open circuit (ICD)

Short circuit (CAF)

Short circuit (ECM)

Kupisa ndiro

Zvisinei, mukukundikana kuongororwa kwezvinetso zvekuvimbika kunoshanda, kukundikana kwemaitiro ekukundikana kwakafanana kunogona kunge kwakaoma uye kwakasiyana. Naizvozvo, sekuferefeta nyaya, gadzirisa kufunga kwekuongorora, kufunga kwakasimba uye nzira dzakasiyana dzekuongorora dzinodiwa kuti uwane chikonzero chaicho chekutadza. Mukuita uku, chero chinongedzo chinoregeredza zvishoma, chinogona kukonzera “kusarongeka, nhema uye mhosva”.

General Analysis yekuvimbika Matambudziko Background Information collection

Ruzivo rwekumashure ndiyo hwaro hwekutadza kuongororwa kwematambudziko ekuvimbika, inokanganisa zvakananga maitiro ezvese kunotevera kutadza kuongororwa, uye ine simba rakasimba pasarudzo yekupedzisira. Naizvozvo, kusati kwatadza kuongororwa, ruzivo rwekutadza kunofanirwa kuunganidzwa zvakanyanya sezvinobvira, kazhinji kusanganisira asi kwete kugumira kune:

(1) Kukundikana kwehuwandu: kukundikana batch ruzivo uye inoenderana nekutadza mwero

(1) Kana iyo batch imwe chete yematambudziko ekugadzirwa kwehuwandu, kana yakaderera kutadza mwero, saka mukana weabnormal process control yakakura;

(2) Kana pane matambudziko mubatch yekutanga / mabheti akawanda, kana chiyero chekukundikana chakakwirira, simba rezvinhu uye zvigadzirwa zvekugadzira hazvigoni kubviswa;

(2) Pre-falute treatment: ingave PCB kana PCBA yakapinda munhevedzano yemaitiro ekutanga kurapwa kusati kwaitika. Zvakajairwa pretreatment zvinosanganisira reflux usati wabika, / lead-free reflow soldering uye/lead-free wave crest welding uye manual welding, nezvimwewo, kana zvichidikanwa kuti unzwisise zvakadzama zvinhu zvese zvinoshandiswa mu pretreatment process (senge solder paste, stencil, solder waya, etc.), midziyo (soldering iron simba, etc.) uye parameters (kuyerera curve uye parameters of wave soldering, ruoko soldering tembiricha, etc.) mashoko;

(3) Kukundikana mamiriro ezvinhu: iyo chaiyo ruzivo apo PCB kana PCBA inokundikana, dzimwe dzayo dzakundikana mukugadzirisa kwekugadzirisa zvakadai sewelding uye gungano, zvakadai sekushaya solderability, stratification, nezvimwewo; Vamwe vari mukuchembera kunotevera, kuyedzwa uye kunyange kushandiswa kwekukundikana, seCAF, ECM, ndiro inopisa, nezvimwe; Nzwisiso yakadzama yekutadza maitiro uye zvinoenderana paramita;

Kutadza PCB/PCBA ongororo

Kazhinji, huwandu hwezvigadzirwa zvakakundikana hushoma, kana chidimbu chimwe chete, saka kuongororwa kwezvigadzirwa zvakakundikana kunofanirwa kutevedzera musimboti weiyo layer ne layer yekuongorora kubva kunze kuenda mukati, kubva pakusaparadza kusvika pakuparadzwa, nenzira dzese kudzivirira kuparadzwa nguva isati yakwana. yenzvimbo yekukundikana:

(1) Kucherechedza chitarisiko

Kuonekwa kwekutarisa ndiyo nhanho yekutanga yekukundikana kwekuongorora chigadzirwa. Kuburikidza nekuonekwa kweiyo saiti yekutadza uye yakasanganiswa neruzivo rwekumashure, vane ruzivo rwekutadza kuongorora mainjiniya vanogona kuona zvakati wandei zvinokonzeresa kutadza uye kuita yekutevera ongororo zvinoenderana. Nekudaro, zvinofanirwa kucherechedzwa kuti kune nzira dzakawanda dzekutarisa chitarisiko, kusanganisira kuona, girazi rinosimudza ruoko, girazi rekukudza desktop, stereoscopic maikorosikopu uye metallographic maikorosikopu. Nekudaro, nekuda kwekusiyana kwemwenje sosi, yekufungidzira musimboti uye kudzika kwekutarisa kwemunda, iyo morphology inocherechedzwa nemidziyo inoenderana inoda kuongororwa zvakadzama zvichienderana nemidziyo yezvinhu. Zvinorambidzwa kuita mutongo nekukasira uye kugadzira preconceived subjective guesswork, izvo zvinotungamira kune isiri iyo nzira yekutadza kuongorora uye kutambisa zvakakosha zvakakundikana zvigadzirwa uye nguva yekuongorora.

(2) Kuongorora kwakadzama kusina kuparadza

Kune kumwe kutadza, kutaridzika kwekutarisa kwega hakugone kuunganidza ruzivo rwakakwana rwekukundikana, kana kunyange nzvimbo yekukundikana haigone kuwanikwa, senge delamination, virtual welding uye kuvhurwa kwemukati, etc. Panguva ino, dzimwe nzira dzisiri dzinoparadza dzekuongorora dzinofanira kushandiswa. unganidza rumwe ruzivo, kusanganisira ultrasonic chikanganiso chekuonekwa, 3D X-ray, infrared thermal imaging, pfupi-circuit nzvimbo yekuona, nezvimwe.

Muchikamu chekutarisisa chitarisiko uye nondestructive ongororo, zvinofanirwa kutarisisa kune zvakajairwa kana zvakasiyana hunhu hwezvakasiyana zvigadzirwa zvekutadza, izvo zvinogona kushandiswa sereferensi yeinotevera yekutadza kutonga. Mushure mekunge ruzivo rwakakwana rwaunganidzwa panguva yekusakanganisa yekuongorora chikamu, yakanangwa yekutadza kuongororwa inogona kutanga.

(3) Kukundikana kuongorora

Kutadza kuongorora kwakakosha, uye ndiyo nhanho inonyanya kukosha, kazhinji inotaridza kutadza kuongorora kubudirira kana kutadza. Pane nzira dzakawanda dzekuongorora kutadza, sekutarisa electron microscopy & elemental ongororo, yakachinjika/yakatwasuka chikamu, FTIR, nezvimwewo, isingatsanangurwe muchikamu chino. Panguva ino, kunyange zvazvo nzira yekukundikana yekuongorora yakakosha, chinonyanya kukosha ndechekunzwisisa uye kutonga kwedambudziko rekuremara, uye kunzwisisa kwakarurama uye kwakajeka kwemaitiro ekukundikana uye maitiro ekukundikana, kuitira kuti uwane chikonzero chaicho chekukundikana.

Bare board PCB ongororo

Kana chiyero chekutadza chakanyanya, kuongororwa kwePCB isina chinhu kwakakosha sekuwedzera kune kutadza kukonzera kuongororwa. Kana chikonzero chekutadza chinowanikwa muchikamu chekuongorora chiri chirema che-bare-board PCB chinotungamira kukuwedzera kuvimbika kutadza, zvino kana isina-bhodhi PCB ine chikanganiso chimwe chete, iyo imwechete yekutadza maitiro seyakakundikana chigadzirwa inofanirwa kuratidzwa mushure mekurapa kumwe chete. process seyakakundikana chigadzirwa. Kana iyo imwechete yekukundikana modhi isina kudzokororwa, saka chikonzero chekuongorora cheyakakundikana chigadzirwa chakashata, kana kuti chisina kukwana.