1. Lub teeb liab kab uas yuav tsum tau impedance yuav tsum tau teem nyob rau hauv nruj raws li txoj kab dav thiab kab nrug xam los ntawm pawg. Piv txwv li, xov tooj cua zaus teeb liab (ib txwm 50R tswj), tseem ceeb ib leeg-kawg 50R, sib txawv 90R, sib txawv 100R thiab lwm yam teeb liab kab, qhov tshwj xeeb kab dav thiab kab sib nrug yuav suav tau los ntawm stacking (daim duab hauv qab).

Yuav ua li cas teeb tsa kab dav thiab kab sib nrug hauv PCB tsim

2. Qhov tsim kab dav thiab kab sib nrug yuav tsum xav txog cov txheej txheem tsim khoom ntawm cov khoom siv PCB xaiv. Yog hais tias txoj kab dav thiab kab sib nrug tau teem kom dhau qhov txheej txheem muaj peev xwm ntawm kev koom tes PCB cov chaw tsim khoom thaum lub sijhawm tsim, cov nqi tsim khoom tsis tsim nyog yuav tsum tau ntxiv, thiab qhov tsim tsis tuaj yeem tsim. Feem ntau, txoj kab dav thiab kab sib nrug yog tswj tau rau 6/6mil nyob rau hauv ib txwm muaj xwm txheej, thiab lub qhov ntawm lub qhov yog 12mil (0.3mm). Yeej, ntau tshaj 80% ntawm PCB manufacturers tuaj yeem tsim nws, thiab cov nqi tsim khoom yog qhov qis tshaj. Qhov tsawg kawg nkaus kab dav thiab kab sib nrug yog tswj mus rau 4/4mil, thiab lub qhov ntawm lub qhov yog 8mil (0.2mm). Yeej, ntau tshaj 70% ntawm PCB manufacturers tuaj yeem tsim nws, tab sis tus nqi yog me ntsis kim dua li thawj rooj plaub, tsis kim heev. Qhov tsawg kawg nkaus txoj kab dav thiab kab sib nrug yog tswj tau rau 3.5 / 3.5mil, thiab ntawm lub qhov yog 8mil (0.2mm). Lub sijhawm no, qee lub tuam txhab PCB tsis tuaj yeem tsim nws, thiab tus nqi yuav kim dua. Qhov tsawg kawg nkaus kab dav thiab kab sib nrug yog tswj tau rau 2/2mil, thiab lub qhov ntawm lub qhov yog 4mil (0.1mm, lub sijhawm no, feem ntau yog HDI dig muag faus ntawm tus tsim, thiab laser vias yuav tsum tau). Lub sijhawm no, feem ntau cov tuam txhab PCB tsis tuaj yeem tsim nws, thiab tus nqi yog qhov kim tshaj plaws ntawm. Cov kab dav thiab kab sib nrug ntawm no hais txog qhov loj ntawm cov khoom xws li kab-rau-qhov, kab-rau-kab, kab-rau-pad, kab-rau-via, thiab qhov-rau-disk thaum teeb tsa cov cai.

3. Teem cov cai los txiav txim siab txog kev tsim cov fwj hauv cov ntaub ntawv tsim. Yog hais tias muaj 1 hli BGA nti, tus pin qhov tob yog qhov ntiav, tsuas yog ib qho teeb liab kab yog xav tau ntawm ob kab ntawm pins, uas tuaj yeem teem rau 6/6 mil, tus pin qhov tob tob dua, thiab ob kab ntawm pins yuav tsum tau. Lub teeb liab kab yog teem rau 4/4mil; muaj 0.65 hli BGA nti, uas feem ntau yog teem rau 4/4mil; muaj 0.5 hli BGA nti, kab dav dav thiab kab sib nrug yuav tsum tau teem rau 3.5/3.5mil; muaj 0.4mm BGA Chips feem ntau xav tau HDI tsim. Feem ntau, rau kev tsim cov fwj, koj tuaj yeem teeb tsa cov cai hauv cheeb tsam (saib qhov kawg ntawm tsab xov xwm [AD software los teeb ROOM, ALLEGRO software los teeb tsa cov cai hauv cheeb tsam]), teeb tsa kab hauv zos dav thiab kab sib nrug mus rau qhov me me, thiab teeb tsa cov cai rau lwm qhov ntawm PCB kom loj dua rau kev tsim khoom. Txhim kho tus nqi tsim nyog ntawm PCB tsim.

4. Nws yuav tsum tau teem raws li qhov ceev ntawm PCB tsim. Qhov ceev yog me me thiab lub rooj tsavxwm yog looser. Txoj kab dav thiab kab sib nrug tuaj yeem tsim kom loj dua, thiab rov ua dua. Txoj kev niaj hnub tuaj yeem teeb tsa raws li cov kauj ruam hauv qab no:

1) 8/8mil, 12mil (0.3mm) rau ntawm qhov

2) 6/6mil, 12mil (0.3mm) rau ntawm qhov

3) 4/4mil, 8mil (0.2mm) rau ntawm qhov

4) 3.5/3.5mil, 8mil (0.2mm) rau ntawm qhov

5) 3.5/3.5mil, 4mil rau ntawm qhov (0.1mm, laser drilling).

6) 2/2mil, 4mil rau ntawm qhov (0.1mm, laser drilling).