Muburyo bwaPCBgukora, umusaruro wa aIcyuma Cyuma (kizwi kandi nka "stencil")ikorwa kugirango ushyire muburyo bwiza bwo kugurisha paste kumurongo wa PCB.Igurisha rya paste layer, nanone bita "paste mask layer", ni igice cya dosiye yububiko bwa PCB ikoreshwa mugusobanura imyanya nuburyo bwakugurisha.Uru rupapuro rugaragara mbere yatekinoroji yo hejuru (SMT)ibice bigurishwa kuri PCB, byerekana aho paste yagurishijwe igomba gushyirwa.Mugihe cyo kugurisha, icyuma cyerekana ibyuma bitwikiriye, kandi paste yuwagurishijwe ashyirwa muburyo bwa PCB unyuze mu mwobo uri kuri stencil, bigatuma igurishwa ryukuri mugihe cyo guteranya ibice.
Kubwibyo, kugurisha paste layer ni ikintu cyingenzi mugukora ibyuma byuma.Mubyiciro byambere byo gukora PCB, amakuru ajyanye nuwagurishije paste yoherejwe kubakora uruganda rwa PCB, rukabyara ibyuma bihuye kugirango bigenzurwe neza kandi byizewe mubikorwa byo kugurisha.
Mu gishushanyo cya PCB (Icapiro ry'umuzunguruko wacapwe), "pastemask" (izwi kandi nka "kugurisha paste mask" cyangwa "mask yo kugurisha") ni urwego rukomeye.Ifite uruhare runini muburyo bwo kugurisha guteranaibikoresho byo hejuru (SMDs).
Imikorere ya stencil yicyuma nugukumira paste yugurisha gukoreshwa mubice aho kugurisha bitagomba kubaho mugihe cyo kugurisha ibice bya SMD.Solder paste nibikoresho bikoreshwa muguhuza SMD ibice bya PCB, kandi urwego rwa pastemask rukora nka "bariyeri" kugirango barebe ko paste igurishwa ikoreshwa ahantu hagurishijwe gusa.
Igishushanyo mbonera cya pastemask gifite akamaro kanini mubikorwa byo gukora PCB kuko bigira ingaruka nziza kubicuruzwa no mumikorere rusange yibigize SMD.Mugihe cyogushushanya kwa PCB, abashushanya bakeneye gusuzuma neza imiterere yimiterere ya pastemask, bakemeza ko ihuza nizindi nzego, nkurwego rwa padi hamwe nibice bigize ibice, kugirango byemeze neza kandi byizewe muburyo bwo kugurisha.
Igishushanyo mbonera cya Solder Mask Layeri (Steel Stencil) muri PCB:
Mu gushushanya no gukora PCB, ibisobanuro byerekana inzira ya Solder Mask Layeri (bizwi kandi nka Steel Stencil) mubisanzwe bisobanurwa nibipimo byinganda nibisabwa nababikora.Hano haribintu bisanzwe bishushanya kubisobanuro bya Solder Mask Layeri:
1. IPC-SM-840C: Nibisanzwe kuri Solder Mask Layeri yashizweho na IPC (Ishyirahamwe rihuza ibikoresho bya elegitoroniki).Ibipimo byerekana imikorere, ibiranga umubiri, biramba, uburebure, hamwe nibisabwa kugirango ugurishe mask.
2. Ibara n'ubwoko: Mask igurisha irashobora kuza muburyo butandukanye, nkaUrwego rushyushye rwo kugurisha ikirere (HASL) or Amashanyarazi Nickel Immersion Zahabu(ENIG), kandi ubwoko butandukanye bushobora kugira ibisobanuro byihariye bisabwa.
3. Igipfukisho cya Maskeri ya Solder: Igicuruzwa cya mask kigurisha kigomba gukwira ahantu hose hasabwa kugurisha ibice, mugihe hagomba gukingirwa neza ahantu hatagomba kugurishwa.Igicuruzwa cya mask kigurishwa nacyo kigomba kwirinda gupfukirana ibice byashyizweho cyangwa ibimenyetso bya silk-ecran.
4. Ubusobanuro bwa Mask Layeri ya Solder: Igicuruzwa cya mask yagurishijwe kigomba kuba gisobanutse neza kugirango kigaragare neza kumpande zipapuro zagurishijwe no kwirinda ko paste yagurishijwe itemba ahantu hatifuzwa.
5. Ubunini bwa Mask Layeri ya Solder: Ubunini bwikiguzi cyagurishijwe bugomba kubahiriza ibisabwa bisanzwe, mubisanzwe murwego rwa micrometero mirongo.
6. Kwirinda pin: Bimwe mubice bidasanzwe cyangwa pin birashobora gukenera kuguma bigaragara mugice cyabigenewe kugirango byuzuze ibisabwa.Mu bihe nk'ibi, ibicuruzwa byabigenewe birashobora gusaba kwirinda ikoreshwa rya mask yo kugurisha muri utwo turere twihariye.
Kubahiriza ibi bisobanuro nibyingenzi kugirango hamenyekane ubuziranenge nukuri kwabacuruzi ba mask bagurisha, bityo bizamure igipimo cyo gutsinda no kwizerwa mubikorwa bya PCB.Byongeye kandi, kubahiriza ibyo bisobanuro bifasha guhindura imikorere ya PCB kandi bigakora neza guteranya no kugurisha ibice bya SMD.Gufatanya nuwayikoze no gukurikiza ibipimo bijyanye mugihe cyogushushanya nintambwe yingenzi muguhuza ubuziranenge bwicyuma.
Igihe cyo kohereza: Kanama-04-2023
