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dangcv8
01

Lipotso Tse Botsoang Khafetsa
lenaneo2v
02

Lipotso Tse Botsoang Khafetsa ka Tšebeletso ea PCB
ddangusw
03

Lipotso Tse Botsoang Khafetsa ka Tšebeletso ea Kopano ea PCB

LBH

PCB ea ho cheka morao

Ho Cheka ha PCB Back ke eng?

Ts'ebetso ea ho cheka ka morao ho PCB, eo hape e tsejoang e le ho cheka ka botebo bo laoloang, e kenyelletsa ho tlosa stub ka har'a li-PCB tse nang le mekhahlelo e mengata ho etsa li-vias. Sepheo sa ho cheka ka morao ke ho nolofatsa phallo ea matšoao lipakeng tsa mekhahlelo e fapaneng ea boto ntle le tšitiso ho tsoa ho li-stub tse sa batleheng.
Ho fana ka tlhaloso e hlakileng haholoanyane ea ts'ebetso ea ho phunya ka morao, a re nahaneng ka mohlala.
A re re ho na le PCB ea mekhahlelo e 12 e nang le lesoba le phunyeletsang le hokahanyang mekhahlelo ea pele le ea bo12. Sepheo ke ho hokahanya lera la pele feela lera la bo9, ha ka nako e ts'oanang ho boloka mekhahlelo ea bo10 ho isa ho ea bo12 e sa hokahanngoa. Leha ho le joalo, mekhahlelo e sa hokahanngoang e hlahisa "li-stub" tse ka sitisang tsela ea lets'oao, e leng se fellang ka mathata a botšepehi ba lets'oao. Ho cheka ka morao ho kenyelletsa ho phunya li-stub tsena ho tloha ka lehlakoreng le ka morao la boto ho ntlafatsa phetiso ea lets'oao.

Morero oa ho cheka ka morao ha PCB ke ofe?

Ho tjheka ka morao ha PCB ho sebediswa ho tlosa karolo e sa sebediswang ya lesoba le phuthetsweng (ka) le fetang lera la ho qetela la PCB. Tshebetso ena e thusa ho fokotsa mathata a botshepehi ba letshwao, jwalo ka ho thothomela ha stub le ho bontsha matshwao, tse ka etsahalang meralong ya dijithale e potlakileng.

"Karolelano ea likarolo" ke eng?

Lipotso Tse Botsoang Khafetsa mabapi le liboto tsa potoloho tse hatisitsoeng › TERMINOLOJI
Kamano pakeng tsa bophara ba lesoba le bolelele ba lona. Ha moetsi a bolela hore tlhahiso ea bona e na le "karolelano ea aspect" ea 8:1, ho bolela, mohlala, hore bophara ba lesoba ke 0.20 mm ka har'a PCB e teteaneng ea 1.60 mm.
Bakeng sa dibopeho tsa HDI, karolelano ya aspect bakeng sa microvia e lekanyeditswe ho 1:1, empa 0.7-0.8:1 e molemo ho feta ho nolofatsa plating.

Melemo ea ho cheka ka morao ho PCB ke efe?

Melemo ea ho cheka ka morao ho PCB e kenyelletsa ho ntlafala ha botšepehi ba lets'oao, ho fokotseha ha tahlehelo ea ho kenya, taolo e ntlafalitsoeng ea ho bua ka tsela e fapaneng, le keketseho ea bandwidth. Ka ho tlosa karolo e sa sebelisoang ea via barrel, ho cheka ka morao ho fokotsa molumo oa stub le lipontšo tsa lets'oao, e leng se fellang ka phetiso ea lets'oao e hloekileng le e nepahetseng haholoanyane.