Yakadhindwa redunhu bhodhi mushure mekudzoreredza kuwanda kunokonzeresa kubheta kukombama kweplate kukamhina, mazwi akakomba anogona kutokonzeresa zvinhu zvisina chinhu kutenderera, shongwe uye zvichingodaro, sei kuikunda?

1. Kukuvadza kwePCB redunhu bhodhi deformation

Mune otomatiki pamusoro yekumisikidza mutsetse, kana redunhu bhodhi isina kutsetseka, inokonzeresa kusarongeka kumisikidza, zvikamu hazvigone kuiswa kana kuiswa mugomba uye nepamusoro pekusimudza padhi rebhodhi, uye kunyange kukuvadza otomatiki kuisa muchina. Iyo redunhu bhodhi rakatakurwa nezvakakombama rakakotama mushure mekushuvira, uye chikamu chemakumbo chinonetsa kutema zvakanaka. Mabhodhi haakwanise kuiswa muchassis kana muchina masokisi, saka gungano gungano rakasangana nebhodhi kutenderera iri zvakare kunetsa. Parizvino, yekumusoro yekumisikidza tekinoroji iri kusimukira yakanangana nemhando yepamusoro, kumhanya nekukurumidza uye kwakangwara kutungamira, iyo inoisa kumberi kukwirisa kunodiwa kwePCBhodhi bhodhi semusha wezvinhu zvakasiyana.

Iyo IPC standard inonyatsotaura kuti iyo yepamusoro inobvumidzwa deformation ndeye 0.75% yePBB board ine pamusoro pegomo mudziyo uye 1.5% yePCBboard isina pamusoro pechinhu chepamusoro. Muchokwadi, kuitira kuzadzikisa zvido zvekukwirisa uye kumhanya nekumhanyisa, vamwe vanogadzira zvigadzirwa zvemagetsi vane zvinodzvinyirira zvakanyanya zvekushanduka.

Pcb bhodhi inoumbwa nemhangura foil, resin, girazi jira uye zvimwe zvinhu, zvese izvo zvine akasiyana epanyama uye emakemikari zvivakwa. Mushure mekumanikidzwa pamwe chete, kupisa kwemhepo kunosara kunozomboitika, zvichikonzera kushanduka. Panguva imwecheteyo muchiitiko chePCB yekugadzirisa, kuburikidza nekupisa kwakanyanya, michina yekucheka, kunyorova maitiro uye imwe nzira, ichaburitsa yakakosha pesheni deformation, muchidimbu inogona kukonzera PCB deformation yakaoma, nzira yekudzora kana kubvisa yakonzerwa nezvinhu zvakasiyana zvezvinhu uye kugadzirisa, iko kushomeka kwevagadziri vePBB rimwe rematambudziko akaomarara.

2. Kukonzera kuongorora kwekushanduka

Iko kushomeka kwePCBboard bhodhi inoda kuongororwa kubva kune izvo zvinhu zvezvinhu, chimiro, graphic kugovera, kugadzirisa maitiro uye zvichingodaro. Iri bepa richaongorora uye kujekesa zvikonzero zvakasiyana siyana zvekugona kushanduka uye nzira dzekuvandudza.

Iyo isina kuenzana nzvimbo yemhangura pamusoro pedunhu bhodhi ichaita kuti kuwedzere kukombama uye kumonyoroka kwebhodhi.

Pane yakajairwa wedunhu bhodhi dhizaini ine nzvimbo yakakura yemhangura foil yekumisikidza, dzimwe nguva Vcc dura rakagadzira nzvimbo hombe yemhangura foil, kana idzi nzvimbo huru dzemhangura foil dzisingakwanise zvakaenzana kugoverwa mune imwechete wedunhu mabhodhi, inokonzeresa kusaenzana kupisa uye kutonhora kumhanya, wedunhu mabhodhi, ehe saizvozvo, zvakare inogona kupisa bilges kutonhora kudzikira, Kana iko kuwedzera uye kudzvinyirira kusingakwanise kukonzereswa panguva imwechete nekunetsekana kwakasiyana uye kushanduka, panguva ino kana tembiricha yebhodhi yasvika pamuganhu wepamusoro weTg kukosha, bhodhi rinotanga kunyevenuka, zvichikonzera kushanduka zvachose.

Nzvimbo dzekubatanidza (ViAs) dzematanho ari pabhodhi dzinogumira kuwedzera uye kudzvinyirira kwebhodhi

Mazuva ano, iro redunhu bhodhi rinonyanya multilayer bhodhi, uye pachave nemariveti senge yekubatanidza poindi (VIAS) pakati peiyo dura uye iyo dura, yekubatanidza nzvimbo yakakamurwa kuita kuburikidza kuburikidza gomba, bofu gomba uye yakavigwa gomba, uko kune yekubatana poindi kudzikamisa kuitika kwekuwedzera kweplate uye kudzvinyirira, zvakare kunokonzeresa kukombama kweplate uye kupeta kweplate.

Kurema kwebhodhi redunhu pachayo kunogona kukonzera kuti bhodhi rizeye uye deform

General Welding vira inoshandisa keteni kutenderera iyo redunhu bhodhi mune yekutsvavira biravira, ndiko kuti, apo mativi maviri ebhodhi apo fulcrum yekutsigira iyo bhodhi rese, kana bhodhi riri pamusoro pezvakawandisa zvikamu, kana saizi yeiyo bhodhi rakanyanya kukura, nekuda kwehuwandu hwayo uye rinoonekwa pakati pechiitiko chekuora mwoyo, zvichikonzeresa kukombama kweplate.

Kudzika kweV-kutemwa uye tambo yekubatanidza kunokanganisa kushomeka kwepaneru

Chaizvoizvo, V-kutemwa ndiyo honzeri yekuparadza sub-chimiro chebhodhi, nekuti V-kutemwa ndeyeKucheka maburi pane yekutanga hombe jira, saka zviri nyore kukanganisa nzvimbo yeV-kutemwa.

2.1 Impact kuongororwa kwezvakatsikirirwa zvinhu, zvivakwa uye magiraidhi pane ndiro deformation

Pcb bhodhi inoitwa nekutsikirira yepakati bhodhi, semi-yakasimbiswa pepa uye yekunze mhangura mapepa. Iyo yepakati bhodhi uye yemhangura mapepa anodziya uye akaremara panguva yekutsikirira. Huwandu hwekushomeka hunoenderana neyakaganhurana yekuwedzera kwekushisa (CTE) yezvinhu zviviri izvi.

Iyo coefficient yekupisa kwekuwedzera (CTE) yemhangura foil ndeye

Z-cTe yechinyakare FR-4 substrate paTg poindi ndeye.

Pamusoro peTG poindi, iri (250-350) x10-6, uye x-cTE inowanzo fanika nemhangura yemhangura nekuda kwekuvapo kwegirazi regirazi.