Isesengura ry'ikoranabuhanga ryo gucukura inyuma mu gishushanyo mbonera cya PCB cyihuta cyane

Ubwa mbere, ibice bigize umurongo w’itumanaho wihuta cyane ni ibi bikurikira:

(1) Gupfunyika Chip: Ubusanzwe, ubugari bw'insinga za PCB imbere mu gupfunyika Chip buba buto cyane ugereranyije n'ubwa PCB isanzwe, bigatuma kugenzura impedance bigorana;

(2) PCB ikoresheje: PCB ikoresheje ubusanzwe ni ingaruka zifatika zifite impedance nkeya, kandi igomba kuba ari yo yibanda cyane kandi itunganyijwe neza mu miterere ya PCB;

(3) Umuhuza: Imiterere y'umuhuza w'umuringa uri imbere mu muhuza iterwa n'ubwizerwe bwa mekanike n'imikorere y'amashanyarazi, bityo bigomba gushaka uburinganire hagati y'ibyo byombi.

Uburyo bwa PCB busanzwe bukozwe nk'aho ari utwenge two kunyuramo (kuva hejuru kugeza ku rwego rwo hasi). Iyo umurongo wa PCB uhuza uburyo bwa via ugenzuwe hafi y'urwego rwo hejuru, "stub" ihinduka ku buryo bwo kunyuramo uburyo bwa PCB, bigatera kugaragara kw'ibimenyetso kandi bigira ingaruka ku bwiza bw'ibimenyetso. Ibi bigira ingaruka zikomeye ku bimenyetso ku muvuduko wo hejuru.

Ikoranabuhanga ryo gucukura inyuma ryerekeza ku ikoreshwa ry'uburyo bwo gucukura bugenzura ubujyakuzimu, hakoreshejwe uburyo bwa kabiri bwo gucukura kugira ngo hatoborwe inkuta z'umwobo wa Stub w'umuhuza cyangwa ikimenyetso binyuze muri.

Nkuko bigaragara ku ishusho iri hepfo, nyuma yuko umwobo uhishwe, agace k'umwobo uhishwe ka PCB gakurwaho hakoreshejwe gucukura kabiri "ku ruhande rw'inyuma". Birumvikana ko umurambararo w'agace k'umwobo uhishwe inyuma ugomba kuba munini kuruta ingano y'umwobo uhishwe, kandi urwego rwo kwihanganira ubujyakuzimu bw'uburyo bwo gucukura rugomba gushingira ku ihame ryo "kudahungabanya isano iri hagati y'umwobo wa PCB n'insinga", kwemeza ko "uburebure bw'agace k'umwobo busigaye ari buto bushoboka", byitwa "gucukura ubujyakuzimu".

Imbonerahamwe y'icyitegererezo cy'igice cya BackDrill kinyura mu mwobo

Ishusho iri hejuru ni igishushanyo mbonera cy'igice cya BackDrill kiri mu mwobo unyura. Uruhande rw'ibumoso ni ikimenyetso gisanzwe kinyura mu mwobo unyuramo, iburyo hari igishushanyo mbonera cy'umwobo unyuramo nyuma ya BackDrill, kigaragaza gucukura kuva ku rwego rwo hasi kugeza ku rwego rw'ikimenyetso aho ikimenyetso giherereye.

Ikoranabuhanga ryo gucukura inyuma rishobora gukuraho ingaruka za parasite capacitance ziterwa n'uduti two ku nkuta z'imyobo, rigatuma insinga n'impedance bihoraho ku mwobo uri mu murongo w'inzira, bigagabanya ubwiza bw'ibimenyetso, bityo bikanoza ubwiza bw'ibimenyetso.

Ubu ikoranabuhanga rya Backdrill ni ryo rihendutse cyane, rikaba ari ryo ritanga umusaruro mwiza mu kunoza imikorere yo kohereza imiyoboro. Gukoresha ikoranabuhanga ryo gucukura inyuma bizongera ikiguzi cyo gukora PCB ku rugero runaka.

Gucukura inyuma bigizwe n'ubwoko bubiri: gucukura inyuma ku ruhande rumwe n'ugucukura inyuma ku mpande ebyiri.

Gucukura impande imwe bishobora kugabanywamo gucukura inyuma uhereye hejuru cyangwa hasi. Umwobo wa PIN w'agapira ko guhuza ushobora gucukurwa inyuma gusa uhereye ku ruhande ruteganye n'aho umurongo uherereye. Iyo imiyoboro y'ibimenyetso byihuse ishyizwe ku buso bwo hejuru no hasi bwa PCB, gucukura inyuma ku mpande ebyiri birakenewe.

1) Kugabanya urusaku rwinshi;

2) Kunoza ubuziranenge bw'ikimenyetso;

3) Ubugari bw'urubaho rwo mu gace karwo buragabanuka;

4) Gabanya ikoreshwa rya "hived/blind via" kugira ngo ugabanye ingorane zo gukora PCB.

Uruhare rwo gucukura inyuma ni uruhe?

Inshingano yo gucukura inyuma ni ugucukura ibice binyura mu mwobo bidafite aho bihuriye cyangwa aho bikorera kugira ngo hirindwe ko urumuri rugaruka, gukwirakwira, gutinda, nibindi mu kohereza ibimenyetso byihuse.

Uburyo bwo gucukura inyuma

a. Hari imyobo yo gushyiramo imyobo kuri PCB, ikoreshwa mu gushyiramo imyobo ya mbere no gucukura imyobo ya mbere ya PCB;

b. Electroplate PCB nyuma yo gucukura umwobo wa mbere, hanyuma agafunga umwobo wo gushyiramo icyuma mbere yo gucukura;

c. Kora igishushanyo cyo hanze kuri PCB ikozwe mu buryo bwa electroplated;

d. Gukora electroplating kuri PCB nyuma yo gukora imiterere y'urwego rwo hanze;

e. Koresha umwobo wo gushyiramo ibintu wakoreshejwe n'umucukuzi wa mbere mu gushyiramo ibintu inyuma, kandi ukoreshe icyuma cyo gucukura mu gucukura inyuma;

f. Oza umwobo wo inyuma wacukuwe n'amazi kugira ngo ukureho imyanda yose isigaye yo gucukura imbere.