Yuav ua li cas ua PCB plaub-txheej board pa laminated qauv thiab tsim solder daim npog qhov ncauj

Nrog rau kev tsim cov kev sib tw thiab kev kub ceev, yuav ua li cas kom ntseeg tau tias kev ncaj ncees ntawm ntau lub teeb liab (tshwj xeeb tshaj yog cov teeb liab ceev), uas yog, kom ntseeg tau tias cov teeb liab zoo, tau dhau los ua teeb meem nyuaj. Nyob rau lub sijhawm no, nws yog ib qho tsim nyog los soj ntsuam nrog kev pab cuam ntawm kev sib kis kab txoj kev xav, thiab tswj cov yam ntxwv impedance txuam ntawm cov teeb liab kab dhau los ua tus yuam sij. Yog hais tias lub impedance tswj tsis nruj, nws yuav ua rau muaj kev cuam tshuam lub teeb liab thiab teeb liab distortion, uas ua rau tsim tsis ua hauj lwm.

Cov teeb liab, xws li PCI tsheb npav, PCI-E tsheb npav, USB, Ethernet, DDR nco, LVDS cov cim, thiab lwm yam, txhua yam yuav tsum muaj kev tswj hwm impedance. Kev tswj hwm impedance thaum kawg yuav tsum tau ua tiav los ntawm PCB tsim, thiab cov kev xav tau siab dua kuj tau muab tso rau pem hauv ntej rau txheej txheem PCB. Nyob rau theem pib, peb lub tuam txhab tau tso tawm cov ntaub ntawv thev naus laus zis xws li impedance suav cov cai thiab kev paub yooj yim. Txhawm rau ua kom tau raws li qhov xav tau ntawm qee tus neeg siv khoom, cov hauv qab no yuav qhia peb lub tuam txhab cov qauv 4- txheej Laminated cov qauv ntawm ntau lub phaj thicknesses thiab qee qhov kev ntsuas impedance, cov neeg siv khoom xav tau nws tuaj yeem tsim cov kab impedance dav thiab qhov sib txawv raws li cov kev pom zoo hauv qab no:

1.Lub thickness ntawm cov phaj tiav yog 1.6 hli (laminated qauv):

2.Qhov tuab ntawm cov phaj tiav yog 1.2 hli (laminated qauv):

3. Lub thickness ntawm cov phaj tiav yog 1.0mm (laminated qauv):

4. Lub thickness ntawm cov phaj tiav yog 0.8mm (laminated qauv):

Cov plaub laminated saum toj no yog peb {{0}} txheej txheej txheej txheej laminated laminated qauv. Raws li tuaj yeem pom los ntawm daim duab, PP siv nyob rau hauv cov qauv laminated pa yog 2116, thiab lub thickness yog li 0.12 hli.

Rau peb lub tuam txhab cov qauv xovxwm, qhov tsis sib xws ntawm cov pa impedance kab (xws li L1 txheej impedance kab xa mus rau L2 txheej & L4 txheej impedance kab xa mus rau L3 txheej) tsis tuaj yeem xa mus rau cov txiaj ntsig hauv qab no:

1. Cov txheej txheej txheej dav yog 0.195mm, thiab ib leeg-kawg impedance yog tswj rau 50 ntxiv /-10 feem pua ​​ohm (L1 Ref L2 txheej, L4 txheej Ref L3 txheej)

2. Ob sab kab dav 0.19mm, kab-rau-tooj ​​liab sib nrug 0.254mm, tswj ib leeg-kawg coplanar impedance 50 ntxiv /-10 feem pua ​​ohm (L1 Ref L2 txheej , L4 txheej Ref L3 txheej)

3. Ob sab kab dav 0.1524mm, kab sib nrug 0.2032mm, tswj qhov sib txawv impedance 100 ntxiv /-10 feem pua ​​ohm (L1 Ref L2 txheej, L4 txheej Ref L3 txheej)

4. Ob sab kab dav 0.1868mm, kab sib nrug 0.1778mm, tswj qhov sib txawv impedance 90 ntxiv /-10 feem pua ​​ohm (L1 Ref L2 txheej, L4 txheej Ref L3 txheej)

Qhov no yog cov qauv laminate cov qauv thiab tsim cov npog ntsej muag ntawm PCB plaub-txheej board.