Qhov tseem ceeb ntawm Stiffeners hauv 2-Layer Flexible PCB Stackup

Qhia:

Flexible printed circuit boards (PCBs) tau hloov pauv kev lag luam hluav taws xob los ntawm kev ua kom cov qauv tsim thiab hloov tau yooj yim. Lawv muab ntau qhov zoo ntawm lawv cov kev sib tw nruj, xws li kev tswj xyuas thermal zoo, txo qhov hnyav thiab qhov loj me, thiab txhim kho kev ntseeg tau. Txawm li cas los xij, thaum nws los txog rau 2-txheej hloov pauv PCB pawg-ups, suav nrog stiffeners ua qhov tseem ceeb.Hauv qhov blog no, peb yuav ua tib zoo saib yog vim li cas 2-txheej hloov pauv PCB stackups xav tau stiffeners thiab sib tham txog lawv qhov tseem ceeb hauv kev ua kom pom kev ua haujlwm zoo thiab ua haujlwm ntev.

Kawm paub txog kev hloov pauv PCB stackup:

Ua ntej peb delve rau hauv qhov tseem ceeb ntawm stiffeners, peb thawj zaug yuav tsum muaj kev nkag siab meej txog qhov hloov pauv ntawm PCB layup yog dab tsi. Flexible PCB layup yog hais txog ib qho kev npaj tshwj xeeb ntawm ntau cov khaubncaws sab nraud povtseg hauv lub rooj tsavxwm hloov tau yooj yim. Nyob rau hauv 2-txheej stackup, ib tug saj zawg zog PCB muaj ob txheej tooj liab sib cais los ntawm ib tug saj zawg zog insulating khoom (feem ntau polyimide).

Vim li cas 2-txheej hloov tau PCB stackup xav tau stiffeners?

1. Kev them nyiaj yug tshuab:

Ib qho ntawm cov laj thawj tseem ceeb vim li cas cov stiffeners xav tau nyob rau hauv 2-txheej hloov pauv PCB stackup yog los muab kev txhawb nqa txhua yam. Tsis zoo li PCBs nruj, hloov tau PCBs tsis muaj qhov rigidity. Ntxiv cov stiffeners pab ntxiv dag zog rau cov qauv thiab tiv thaiv PCB los ntawm dabtsi yog khoov lossis warping thaum tuav lossis sib dhos. Qhov no yuav yog qhov tseem ceeb tshwj xeeb tshaj yog thaum cov PCBs hloov tau yooj yim yog feem ntau khoov lossis folded.

2. Txhim khu kev ruaj ntseg:

Ribs ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev ruaj ntseg ntawm 2-txheej hloov pauv PCB pawg-up. Los ntawm kev muab rigidity rau PCB, lawv pab txo qhov muaj peev xwm ntawm kev vibration-induced teeb meem, xws li resonance, uas tuaj yeem cuam tshuam tsis zoo rau tag nrho cov kev ua tau zoo thiab kev ntseeg siab ntawm Circuit Court. Tsis tas li ntawd, stiffeners tso cai rau kev ua kom zoo dua qub thiab kev sau npe thaum lub sij hawm sib dhos, xyuas kom meej qhov chaw ntawm cov khoom thiab cov kab sib txuas.

3. Cov khoom txhawb nqa:

Lwm qhov laj thawj tseem ceeb yog vim li cas 2-txheej flex PCB stackups xav tau stiffeners yog muab kev txhawb nqa rau cov khoom. Ntau cov khoom siv hluav taws xob xav tau cov khoom siv thev naus laus zis saum npoo av (SMT) txhawm rau txhawm rau txhawm rau txhim kho PCBs hloov tau. Lub xub ntiag ntawm stiffeners pab disperse lub mechanical stresses exerted thaum lub sij hawm soldering, tiv thaiv kev puas tsuaj rau precision Cheebtsam thiab xyuas kom meej lawv cov kev sib raug zoo nyob rau hauv lub saj zawg zog substrate.

4. Kev tiv thaiv ib puag ncig:

Flexible PCBs feem ntau yog siv rau hauv cov ntawv thov uas raug rau ib puag ncig hnyav, xws li huab cua kub, av noo, lossis tshuaj lom neeg raug. Cov tav ua raws li kev tiv thaiv kev tiv thaiv, tiv thaiv cov kab mob me me los ntawm kev puas tsuaj los ntawm cov xwm txheej ib puag ncig. Tsis tas li ntawd, lawv pab txhim kho qhov hloov pauv ntawm PCB qhov kev tiv thaiv tag nrho rau cov neeg kho tshuab kev ntxhov siab thiab tiv thaiv kom tsis txhob ya raws, yog li ua rau nws lub neej ntev thiab kev ntseeg tau.

5. Routing thiab Signal Integrity:

Nyob rau hauv 2-txheej flex PCB stackup, teeb liab thiab lub zog ib txwm khiav ntawm txheej sab hauv ntawm flex board. Cov tav yog tam sim no los tswj qhov sib nrug kom zoo thiab tiv thaiv hluav taws xob cuam tshuam ntawm cov txheej tooj liab sab hauv. Tsis tas li ntawd, stiffeners tiv thaiv rhiab high-ceev teeb liab kab los ntawm crosstalk thiab teeb liab attenuation, kom ntseeg tau tswj impedance thiab thaum kawg tswj lub Circuit Court lub teeb liab kev ncaj ncees.

Hauv kev xaus:

Hauv cov ntsiab lus, stiffeners yog ib qho tseem ceeb hauv 2-txheej hloov pauv PCB pawg raws li lawv ua lub luag haujlwm hauv kev muab kev txhawb nqa tshuab, txhim kho kev ruaj ntseg, muab kev txhawb nqa, thiab tiv thaiv ib puag ncig.Lawv tiv thaiv precision circuits, tswj kom pom cov teeb liab kev ncaj ncees, thiab tso cai rau kev sib sau ua tiav thiab txhim khu kev lag luam hauv ntau yam kev siv. Los ntawm kev sib koom ua ke stiffeners rau hauv cov qauv tsim PCB hloov tau, cov kws ua haujlwm tuaj yeem ua kom lub zog thiab lub neej ntev ntawm lawv cov khoom siv hluav taws xob thaum nyiam cov txiaj ntsig ntawm kev hloov pauv hloov pauv.