Kev txhim kho keeb kwm ntawm PCB Board
Txij thaum yug losPCB pawg thawj coj saib, nws tau tsim rau ntau tshaj 70 xyoo.Hauv cov txheej txheem kev loj hlob ntawm ntau tshaj 70 xyoo, PCB tau dhau los ua qee qhov kev hloov pauv tseem ceeb, uas tau txhawb txoj kev loj hlob sai ntawm PCB thiab ua rau nws sai sai rau ntau qhov chaw.Thoob plaws hauv keeb kwm kev loj hlob ntawm PCB, nws tuaj yeem muab faib ua rau lub sijhawm.
(1) Hnub yug ntawm PCB.PCB yug los ntawm 1936 mus rau lig 1940s.Xyoo 1903, Albert Hanson thawj zaug siv lub tswvyim ntawm "kab" thiab siv nws mus rau lub xov tooj hloov xov tooj.Lub tswv yim tsim ntawm lub tswv yim no yog txiav cov ntawv ci nyias nyias rau hauv cov khoom siv hluav taws xob, tom qab ntawd muab cov ntawv nplaum rau hauv daim ntawv paraffin, thiab thaum kawg muab cov ntaub ntawv paraffin rau lawv, yog li tsim cov qauv qauv ntawm PCB niaj hnub no.Xyoo 1936, Dr. Paul Eisner yeej tsim cov tshuab tsim khoom ntawm PCB.Lub sijhawm no feem ntau suav tias yog lub sijhawm yug tiag tiag ntawm PCB.Nyob rau lub sijhawm keeb kwm no, cov txheej txheem tsim khoom tau txais los ntawm PCB yog txheej txheej txheej txheej, txheej txheej txheej txheej, nqus cov txheej txheem, txheej txheej evaporation, chemical deposition method thiab txheej txheej.Lub sijhawm ntawd, PCB feem ntau yog siv hauv xov tooj cua receivers.
(2) Lub sijhawm sim ntau lawm ntawm PCB.Lub sijhawm sim ua PCB yog nyob rau xyoo 1950s.Nrog rau kev txhim kho ntawm PCB, txij li xyoo 1953, cov khoom siv sib txuas lus tsim kev lag luam pib ua tib zoo saib PCB thiab pib siv PCB ntau ntau.Hauv lub sijhawm keeb kwm no, cov txheej txheem tsim khoom ntawm PCB yog txoj kev rho tawm.Txoj kev tshwj xeeb yog siv tooj liab-clad nyias daim ntawv-raws li phenolic resin laminate (PP khoom), thiab tom qab ntawd siv cov tshuaj kom yaj cov ntawv nyiaj tsis xav tau tooj liab, kom cov ntawv nyiaj seem tooj liab tsim ib lub voj voog.Lub sijhawm no, cov tshuaj muaj pes tsawg leeg ntawm cov tshuaj corrosive siv rau PCB yog ferric chloride.Cov khoom sawv cev yog lub xov tooj cua transistor portable tsim los ntawm Sony, uas yog ib txheej PCB nrog PP substrate.
(3) Kev siv lub neej ntawm PCB.PCB tau muab tso rau hauv kev siv hauv xyoo 1960s.Txij li thaum xyoo 1960, cov tuam txhab Nyij Pooj tau pib siv GE cov ntaub ntawv hauv qab (tooj liab-clad iav ntaub epoxy resin laminate) hauv ntau qhov ntau.Xyoo 1964, Asmeskas lub tuam txhab kho qhov muag hluav taws xob tau tsim cov tshuaj electroless tooj liab plating (cc-4 tov) rau cov tooj liab hnyav, yog li pib txoj kev tsim khoom tshiab ntxiv.Hitachi tau qhia cc-4 thev naus laus zis los daws cov teeb meem ntawm cua sov warping deformation thiab tooj liab stripping ntawm domestic Ge substrates ntawm thawj theem.Nrog rau kev txhim kho thawj zaug ntawm cov khoom siv thev naus laus zis, qhov zoo ntawm cov khoom siv hauv Ge tseem txhim kho.Txij li thaum xyoo 1965, qee lub tuam txhab tau pib tsim cov khoom lag luam Ge substrates, Ge substrates rau cov khoom siv hluav taws xob thiab PP substrates rau cov khoom siv hluav taws xob hauv Nyiv.
Post lub sij hawm: Jun-28-2022
