Tsev > Xov xwm > Ntsiab lus

Lub Introduction Ntawm PCB

May 09, 2017

Ib tug sau Circuit Court board (PCB) mechanically txhawb thiab electrically txuas hluav taws xob Cheebtsam siv conductive lem, pawm no ntau npau thiab lwm nta etched los ntawm tooj liab los xij laminated mus rau Anon-conductive substrate. Cheebtsam (eg capacitors, resistors los yog active pab kiag li lawm) muaj feem ntau soldered rau lub PCB. Advanced PCBs tej zaum yuav muaj yam kos nyob rau hauv lub substrate.

PCBs yuav ua tau ib mog (ib tooj liab txheej), muab ob npaug rau mog (ob tooj liab khaubncaws sab nraud povtseg) los yog multi-txheej (txheej thiab puab khaubncaws sab nraud povtseg). Conductors rau txawv khaubncaws sab nraud povtseg yog kev cob cog rua nrog vias. Multi-txheej PCBs pub rau ntau tivthaiv ceev.

FR-4 iav epoxy yog thawj insulating substrate. Ib tug yooj yim lub tsev thaiv ntawm lub PCB yog ib qho FR-4 vaj huam sib luag nrog ib tug nyias txheej ntawm tooj liab ci laminated rau ib los yog ob sab. Nyob rau hauv multi-txheej boards ntau khaubncaws sab nraud povtseg ntawm cov ntaub ntawv uas yog laminated ua ke.

Sau Circuit Court laug cam yog siv nyob rau hauv tag nrho tab sis qhov nyuaj hluav taws xob cov khoom. Lwm yam rau PCBs xws li hlau qhwv thiab point-to-point siv. PCBs yuav tsum tau ntxiv tsim dag zog rau nteg tawm rau hauv Circuit Court, tab sis raug thiab los ua ke yuav tsum caw kaw lus. Raug circuits nrog PCBs yog pheej yig dua thiab sai dua nrog rau lwm cov xov txoj kev raws li lub Cheebtsam yog mounted thiab wired nrog ib feem.

Ib tug tsawg heev PCB nrog ib tug hluas tivthaiv siv rau yooj yim qauv no yog hu ua ib tug breakout board.

Thaum lub Rooj Tswjhwm Saib twb tsis muaj kos Cheebtsam nws yog ntau kom hu ua ib tug luam xov board (PWB) los yog etched thaiv board. Txawm li cas los, lub sij hawm luam xov board tau poob mus rau hauv disuse. Ib tug PCB populated nrog rau hauv Cheebtsam yog hu ua ib tug luam rooj sib txoos (PCA), luam Circuit Court board los ua ke los yog PCB los ua ke (PCBA). Lub IPC nyiam lub sij hawm rau ua ke boards yog Circuit Court card los ua ke (CCA), thiab rau tau koom ua ke backplanes nws yog backplane cov rooj sib txoos. Lub sij hawm PCB yog siv ntawv ob leeg rau liab qab thiab tau koom ua ke boards.