Niaj hnub no, kev hloov pauv ntawm cov khoom siv hluav taws xob zoo dua yuav tsum tau tsim peb-seem ntawm Multilayer PCB. Txawm li cas los xij, txheej txheej teeb tsa cov teeb meem tshiab ntsig txog qhov kev tsim qauv no. Ib qho teeb meem yog tau txais cov khoom lag luam zoo tsim rau qhov haujlwm.

Stacking PCBS tau dhau los ua qhov tseem ceeb raws li ntau thiab ntau txoj kab ntawv luam tawm tau tsim nrog ntau txheej.

Kev tsim cov txheej txheem PCB zoo yog qhov tseem ceeb los txo cov hluav taws xob ntawm PCB cov hluav taws xob thiab cov khoom sib txuas. Ntawm qhov tsis sib xws, kev tsim khoom tsis zoo tuaj yeem ua rau muaj hluav taws xob ntau ntxiv, uas yog teeb meem los ntawm kev xav txog kev nyab xeeb.

PCB stacking yog dab tsi?

The PCB lamination layers the insulation and copper of the PCB before the final layout design is completed. Txhim kho kev teeb tsa tau zoo yog txheej txheem nyuaj. Ib lub PCB txuas lub zog thiab cov cim qhia ntawm cov khoom siv lub cev, thiab kev tsim kom raug ntawm cov khoom siv hauv pawg thawj coj ncaj qha cuam tshuam rau nws txoj haujlwm.

Vim li cas PCB lamination?

Kev tsim PCB lamination yog qhov tseem ceeb rau kev tsim cov laug cam kom zoo. PCB lamination muaj ntau cov txiaj ntsig vim tias ntau txheej txheej txhim kho kev muaj peev xwm faib hluav taws xob, tiv thaiv kev cuam tshuam hluav taws xob, txwv tsis pub cuam tshuam kev cuam tshuam, thiab txhawb kev xa xov nrawm.

Txawm hais tias lub hom phiaj tseem ceeb ntawm kev teeb tsa yog tso ntau qhov hluav taws xob hluav taws xob ntawm ib pawg thawj coj los ntawm ntau txheej, PCB pawg qauv kuj tseem muab lwm qhov txiaj ntsig tseem ceeb. Cov kev ntsuas no suav nrog txo qis qhov tsis txaus ntseeg ntawm lub rooj tsav xwm hauv Circuit mus rau suab nrov sab nraud thiab txo cov teeb meem hla thiab cov teeb meem cuam tshuam hauv cov tshuab ceev.

Zoo PCB lamination tseem tuaj yeem pab ua kom qis dua cov nqi tsim khoom kawg. PCB lamination tuaj yeem txuag sijhawm thiab nyiaj txiag los ntawm kev ua haujlwm tau zoo tshaj plaws thiab txhim kho kev sib nqus sib nqus thoob plaws hauv txoj haujlwm.

Duab qhov chaw: Pixabay

Cov ntawv thiab cov cai rau PCB lamination tsim

Cov naj npawb txheej tsawg

Cov khoom sib dhos yooj yim tuaj yeem suav nrog plaub txheej ntawm PCBS, thaum ntau cov laug cam nyuaj xav tau cov txheej txheem txheej txheem txheej txheem. Txawm hais tias nyuaj dua, qib siab dua tso cai rau cov neeg tsim qauv ntau qhov chaw tso tawm yam tsis muaj kev pheej hmoo ntawm kev ntsib cov kev daws teeb meem tsis yooj yim sua.

Feem ntau, yuav tsum muaj yim lossis ntau dua hauv pem teb kom ua tiav qhov kev tso kawm qib siab thiab sib nrug kom ua haujlwm tau zoo tshaj plaws. Cov hluav taws xob kuj tseem tuaj yeem txo qis los ntawm kev siv lub dav hlau loj thiab lub dav hlau fais fab ntawm lub vaj huam sib luag.

Tsawg txheej

Kev npaj cov tooj liab thiab rwb thaiv tsev txheej uas ua rau lub Circuit Court tsim los ua haujlwm PCB sib tshooj. Txhawm rau tiv thaiv PCB warping, ua ntu ntu ntawm pawg thawj coj saib ua kom sib luag thiab sib npaug thaum npaj cov txheej. Piv txwv li, hauv yim txheej, txheej thib ob thiab qib xya yuav tsum zoo ib yam hauv qhov tuab kom ua tiav qhov sib npaug.

Lub teeb liab txheej yuav tsum ib txwm nyob ib sab ntawm lub dav hlau, thaum lub zog thiab dav hlau dav hlau tau nruj ua ke. It is best to use multiple grounding layers as they usually reduce radiation and ground impedance.

● Txheej khoom hom

Cov cua sov, cov khoom siv hluav taws xob, thiab cov khoom siv hluav taws xob ntawm txhua lub substrate thiab seb lawv cuam tshuam li cas yog qhov tseem ceeb rau kev xaiv PCB lamination cov khoom xaiv.

Lub rooj tsav xwm hauv Circuit Court feem ntau yog tsim los ntawm cov tub ntxhais fiberglass muaj zog, uas muab cov tuab thiab nruj ntawm PCB. Qee qhov PCBS hloov pauv tau tuaj yeem tsim los ntawm cov yas hloov pauv kub.

Cov txheej saum npoo yog daim ntawv nyias nyias ua los ntawm cov ntawv ci tooj liab txuas rau ntawm lub rooj tsavxwm. Tooj liab muaj nyob ntawm ob sab ntawm PCB ob tog, thiab cov tuab ntawm tooj liab sib txawv raws li tus lej ntawm PCB.

The top of the copper foil is covered with a blocking layer to make the copper trace in contact with other metals. Cov ntaub ntawv no yog qhov tseem ceeb los pab cov neeg siv zam kev siv cov hlua dhia hauv qhov chaw raug.

Ib txheej tshuaj ntsuam luam ntawv tau thov rau cov txheej txheem tiv thaiv txheej kom ntxiv cov cim, tus lej thiab cov ntawv rau kev sib dhos yooj yim thiab nkag siab zoo dua ntawm lub rooj tsavxwm.

● Txiav txim xyuas kab thiab hla qhov

Cov neeg tsim qauv yuav tsum tau teeb tsa kev kub ceev hla cov txheej nruab nrab ntawm cov khaubncaws sab nraud povtseg. Qhov no tso cai rau lub dav hlau hauv av los muab daim thaiv npog uas muaj cov hluav taws xob tawm los ntawm qhov chaw ntawm kev kub ceev.

Qhov kev tso kawm ntawm qib teeb liab nyob ze rau theem dav hlau tso cai rau qhov rov qab los tam sim no ntws ntawm cov dav hlau uas nyob ib sab, yog li txo qis txoj kev rov qab los inductance. Tsis muaj lub peev xwm txaus ntawm cov khoom siv hluav taws xob nyob ib sab thiab txheej txheej hauv av los muab kev txiav qis dua 500 MHz siv cov txheej txheem kev tsim qauv.

● Sib nrug ntawm txheej

Raws li lub peev xwm txo qis, kev sib koom ua ke nruj ntawm lub teeb liab thiab lub dav hlau rov qab los tam sim no yog qhov tseem ceeb. Lub zog hluav taws xob thiab hauv av yuav tsum tau ua ke nruj.

Cov txheej txheem teeb tsa yuav tsum nyob ze ib leeg txawm tias lawv nyob hauv cov dav hlau uas nyob ib sab. Tight coupling and spacing between layers is critical for uninterrupted signaling and overall functionality.

xaus

PCB lamination thev naus laus zis Muaj ntau qhov sib txawv ntau txheej PCB tsim. Thaum ntau txheej txheej tau koom nrog, THEM-DIMENSIONAL txoj hauv kev uas txiav txim siab sab hauv cov qauv thiab txheej txheej yuav tsum tau ua ke. Nrog rau kev ua haujlwm siab ntawm kev siv hluav taws xob niaj hnub no, ceev faj PCB pawg yuav tsum tau ua los txhim kho kev faib khoom muaj peev xwm thiab txwv kev cuam tshuam. Kev tsim kho PCBS tsis zoo tuaj yeem txo qis teeb liab, tsim khoom, xa hluav taws xob, thiab tso siab tau ntev.