Maitiro ekuita nekusviba kwemukati weiyo yakawanda-layer PCB board iri nyore?

Basa rekusviba: passivation yemhangura yepamusoro; kuwedzera kushata kwepamusoro kwemukati wefoiri yemhangura, nekudaro kuwedzera simba rekubatanidza pakati peepoxy resin. Pcb bhodhi uye mucheka wemukati wefoil yendarira;

ipcb

Peel simba

Nhema oxidation nzira yeyakajairwa yemukati layer kurapwa kwePCB multilayer board:

PCB multilayer board dema oxidation kurapwa

PCB multilayer board brown oxidation nzira

PCB multilayer board yakaderera tembiricha blackening nzira

PCB multilayer board inotora yakakwira tembiricha yekudzima nzira, iyo yemukati layer bhodhi inoburitsa yakanyanya tembiricha kushushikana (kupisa kushushikana), izvo zvinogona kukonzera kupatsanurwa kwemukati mushure mekucheka kana kuparuka kwemukati mendarira foil;

1. Brown oxidation:

Chigadzirwa cheblack oxidation kurapwa kweakawanda-layer mabhodhi ePCB vanogadzira inonyanya kuve copper oxide, hapana inonzi cuprous oxide. Izvi zvimwe zvisiri izvo muindasitiri iyi. Mushure meESCA (electro specific chemical analysis) ongororo, musiyano uripo pakati pemaatomu emhangura nemaatomu eokisijeni unogona kutariswa. Kusunga simba, chiyero pakati pemaatomu emhangura nemaatomu eokisijeni pamusoro peiyo okisijeni; data rakajeka uye kuongorora kwekucherechedza kunoratidza kuti chigadzirwa chekusviba icopper oxide, uye hapana zvimwe zvikamu;

The general composition of blackening liquid:

Oxidizing agent sodium chlorite

PH inodzivirira trisodium phosphate

Sodium hydroxide

Surfactant

Kana yakakosha mhangura carbonate ammonia solution (25% ammonia mvura)

2. Data yakakodzera

1. Simba rekusvuura (peel simba) 1oz foil yemhangura pakumhanya kwe2mm/min, hupamhi hwefoiri yemhangura ndeye 1/8 inch, uye simba rekusimba rinofanira kunge rakapfuura 5 pounds/inch.

2. Oxide uremu (okisijeni uremu); inogona kuyerwa nenzira yegiravimetric, inowanzodzorwa pa 0.2—0.5mg/cm2

3. Zvinhu zvakakosha zvinokanganisa simba rekubvarura kuburikidza nekuongorora kwakakodzera kwekuchinja (ANDVA: kuongororwa kwekuchinja) ndeiyi:

①Kusangana kwe sodium hydroxide

②Kuwanda kwe sodium chlorite

③Kudyidzana pakati petrisodium phosphate uye nguva yekunyudza

④Kudyidzana pakati pe sodium chlorite uye trisodium phosphate concentration

Iyo simba rekubvarura rinoenderana nekuzadzwa kweresin kune iyo oxide crystal chimiro, saka zvakare ine hukama neakakodzera ma paramita e lamination uye akakodzera zvivakwa zve resin pp.

Kureba kweacicular crystals ye oxide ndeye 0.05mil (1-1.5um) seyakanakisisa, uye simba rekubvarura panguva ino zvakare rakakura;