Tsab ntawv no muab tswv yim rau kev xaiv cov ntaub ntawv los tsim ntau cov PCBs uas ua tiav ob qho tseem ceeb: ua rau cov teeb meem raug tsim (xws li, nyo hau los yog sib tw, nrog rau kev sau npe thiab kev sib tw ua ke). Cov ntaub ntawv pov thawj ntawm koj tus PCB feem ntau yog qhov koj xaiv qhov zoo tshaj plaws rau lawv vim lawv ntseeg tau thiab tsis muaj txiaj ntsig zoo li cas los xij, tiam sis, thaum tsim muaj cov kev cai tshwj xeeb lossis sib koom ua ke ntau ntau cov txheej, ces nws tsim nyog rau tus tsim lub dag zog los ua ntau dua paub txog cov kev xaiv khoom muaj txiaj ntsig, txhawm rau txiav txim siab tshaj plaws rau lawv cov khoom.
Cov khoom tseem ceeb tshaj plaws rau PCB manufacturing yog raw laminate. Nws kuj yog tus nqi loj tshaj plaws ntawm txhua yam ntaub ntawv xav tau los tsim muaj PCB multilayer. Raw laminate muaj feem cuam tshuam rau cov nqi thiab lub sijhawm sij hawm ntawm PCBs. Vim yog cov khoom siv uas tsim nyog rau PCB fabrication, nws yog qhov tseem ceeb rau kev tsim kho qhov loj ntawm koj cov qauv; txawm tias qhov txawv me me loj tuaj yeem ua rau qhov txawv txav ntawm qhov nqi. Cov khoom sib txawv ntawm cov nqi sib txawv thiab nyias muaj nyias cov yam ntxwv, tab sis ntau dua cov laminates feem ntau kuj kim kim. Cov hauv qab no yog qee yam ntawm cov yeeb yam tseemceeb uas yuav tsum nco ntsoov thaum muab cov khoom sib txawv ntawm cov laminates sib piv:
Tg = iav Kev Ntsuas Kub - Qhov kub ntawm qhov kev hloov ntawm lub cev yuav tshwm sim. Nyob rau hauv cov ntaub ntawv ntawm laminates, nws hloov los ntawm ib tug nyuaj, glassy khoom rau hauv ib lub mos, rubbery cov khoom
Td = Decomposition Txias - Kub thaum lub laminate chem decomposes
Dk = Dielectric Constant (tseem hu ua r? Hauv electromagnetics) - Qhia qhov kev sib txuas lus ntawm cov khoom siv insulator, uas yog hais txog nws lub peev xwm los tuav hluav taws xob hauv hluav taws xob. Rau cov hom phiaj insulating, khoom siv nrog sab nraud dielectric qhov zoo dua thiab nyob rau hauv RF daim ntawv thov dua dielectric qhov siab yuav yog ntshaw
Df = Dissipation Factor - Qhia qhov ua tau zoo ntawm cov khoom siv insulating los ntawm kev qhia tus nqi ntawm lub zog poob qis rau qee hom kev oscillation, xws li mechanical, electrical, or electromechanical oscillation
Peb cov chaw tsim muaj nyob rau hauv Suav teb, yog li nws tau txais kev xaiv los xaiv cov kev zoo hauv zos laminates thiaj li txo tau nqi shipping thiab ua lub sijhawm. Lub Shengyi S1000-H (Tg 150) laminate feem ntau yog peb lub neej xaiv rau kev ua tau zoo, nruab nrab-Tg laminate. Shengyi S1000-H yog piv rau Isola FR406 (Tg 150), ib qho qauv North American laminate xaiv. Raws li tau teev nyob rau hauv Table 2 hauv qab no, FR406 ua tau zoo tshaj plaws ntawm Shengyi S1000H ntawm cov Dielectric Constant thiab Dissipation Factor, tab sis qee tus neeg tau txais kev pom zoo los ntawm cov nqi qis thiab / los yog cov sij hawm luv dua.
Cov lus sib piv ntawm PCB cov ntaub ntawv 
Shengyi S1141 (TG 130) yog ib qho zoo tshaj plaws los txo tus nqi ntawm koj qhov project, ntawm kev txi ntawm qee qhov zoo. Yog tias xav tau zoo tshaj, peb xav kom zoo rau Shengyi S1000-2M (TG 170) uas yog qhov zoo tshaj plaws rau Isola FR406 (Tg 170). Qhov zoo tshaj yog qhov tseem ceeb tshaj plaws, peb xav kom siv ITE80 IT180A (TG 180) uas yog los ntawm RoHS raws txoj cai. ITEQ IT180A (TG 180) yog qhov ua tau zoo thiab Isola 370HR (TG 180). Peb ntawm Bittele yuav qhia tawm siv Shengyi S1000H (Tg 130) rau cov haujlwm raug. Peb xav kom koj siv ib qho khoom zoo dua ntawm cov khoom siv laminate yog tias ib qho ntawm peb qhov xwm txheej no tshwm sim: yog tias PCB Tsim muaj 8 los yog ntau tshaj txheej txheem, yog tias Tus Thawj Tuav Tsav Phaus Nyuaj Ntsuas Mob hnyav hnyav dua 3oz, lossis yog PCB Board nrog nyias board thickness ntawm tsawg tshaj li 0.5 hli.
Lub caij ntxiv mus xav txog yog qhov dielectric thickness, uas yuav tsum tau sau tseg rau cov kev cai ntawm impedance. Cov ntaub ntawv ntau ntau ntawm 0.125mm mus rau 1mm hauv thickness. Nyias laminates (xws li 0.1 hli los yog tsawg dua) yog tsim nyog rau qee qhov kev siv qis zog thiab ntxiv mus rau kev sib koom tes ntawm cov PCBs uas muaj ntau lub cev.
Cov ntaub ntawv 2 teev cov ntsiab lus ntawm cov tub ntxhais kawm ua haujlwm nrog rau qhov nyhav tooj rau cov khoom qub FR4
1/1 = 1 oz. tooj ib square taw rau ntawm ob sab ntawv
1/0 = 1 oz. tooj tooj ib square taw, coated rau xwb 1 IB ib sab ntawm daim ntawv
H / H = 0.5 oz. tooj sim ib square taw, coated rau ob sab ntawm daim ntawv
0/0 = UNCLAD (TSIS TAU).
Table 2: Core material thicknesses ntawm muaj cov tooj liab
| Thickness xws li tooj liab (hli.) | Tooj Liab (nws.) |
| 0.145 hli. | H / H oz. |
| 0.17 hli. | 1/1 oz. |
| 0.185 hli. | H / H oz. |
| 0.2 hli. | 1/1 oz. lossis H / H oz. |
| 0.25 hli. | 1/1 oz. lossis H / H oz. |
| 0.3 hli. | 1/1 oz. lossis H / H oz. |
| 0.4 hli. | 1/1 oz. lossis H / H oz. |
| 0.5 hli. | 1/1 oz. lossis H / H oz. |
| 0.6 hli. | 1/1 oz. lossis H / H oz. |
| 0.7 hli. | 1/1 oz. lossis H / H oz. |
| 0.8 hli. | 1/1 oz. lossis H / H oz. |
| 0.9 hli. | 1/1 oz. lossis H / H oz. |
| 1.0 hli. | 1/1 oz. lossis H / H oz. |
| 1.1 hli. | 1/1 oz. lossis H / H oz. |
| 1.2 hli. | 1/1 oz. lossis H / H oz. |
| 1.5 hli. | 1/1 oz. lossis H / H oz. |
| 1.6 hli. | 1/1 oz. lossis H / H oz. |
| 2.2 hli. | 1/1 oz. |
| 2.4 hli. | 1/1 oz. |
| 2.5 hli. | 1/1 oz. |
| 3.0 hli. | 1/1 oz. |
Prepreg yog ib qho khoom sib txuas ua ke uas siv rau hauv cov ntaub ntawv ntawm ntau txheej PCB cov laug cam uas, tom qab kev kho tau zoo tib yam li cov ntaub ntawv tseem ceeb ntawm cov tub ntxhais / txheej txheej. Prepregs muaj ntau hom xim iav 106, 1080, 3313, 2116 thiab 7628 siv los ntawm lub rooj sib txiag. Pawg tuav khoom siv ntau hom prepreg iav. Cov cwj pwm no muaj xws li 106, 1080, 3313, 2116 thiab 7628. Cov kev txwv yuav siv rau tus xov tooj thiab hom prepreg, yog li nws yog qhov zoo tshaj plaws hu rau tus neeg sawv cev ntawm Bittele rau cov lus qhia ntxiv.
Daim 3: Xaiv cov khoom xaiv
| Prepreg / Cov Khw Me Me | Nias Thickness (hli) | Prepreg Resin cov ntsiab lus |
| 106 | 0.05 hli. | Kwv yees. 73% |
| 1080 | 0.075 hli. | Kwv yees. 65% |
| 3313 | 0.09 hli. | Kwv yees. 57% |
| 2116 | 0.115 hli. | Kwv yees. 55% |
| 7628 | 0.185 hli. | Kwv yees. 46% |
| 7628H | 0.195 hli. | Kwv yees. 51% |
Ntsig, qhov thickness ntawm tooj liab txheej yuav tsum tau teev. Qhov kev qhia tshwj xeeb no feem ntau yog txiav txim siab raws li tus nqi tam sim no uas yuav tsum tau dhau los ntawm cov khoom siv ntawm lub rooj tsavxwm. Siv peb Txoj Kev Laj Kab Ntsuas Ntsuam Ntsuas los ntsuas tus qauv ntawm txoj kab ib txoj kab rau ib txoj kab uas muaj tooj liab. Thicker ib qho chaw muaj kev ruaj ntseg zoo dua qub tam sim no dua thawm khoom ntawm tib qhov dav. Koj tuaj yeem xav hais kom pom cov txheej txheem npog ntsej muag rau ib lub rooj sib zog ntau zog yog tias koj xav tias lub rooj tsavxwm yuav tsum khiav hauj lwm hauv cov neeg mob hnyav.
Copper clad FR-4 cov khoom siv laminate yog ntsuas raws kev siv zuj zus (oz) qhov nyhav ib nrab square feet. Cov nram qab no muaj qhov ntau thiab tsawg ntawm lawv cov tuab tuab
0.25 oz. = 0.00035 "(8.75? M)
0.5 oz. = 0.0007 "(17.5? M)
0.75 oz. = 0.00105 "(26.25? M)
1.0 oz. = 0.0014 "(35? M)
2.0 oz. = 0.0028 "(70? M)
3.0 oz. = 0.0042 "(105? M)
4.0 oz. lossis ntau tshaj = 0.0056 "(140? m) lossis ntau dua
NeoDen muab tag nrho cov smt kev sib txuas daws teeb meem, xws li SMT reflow qhov cub, yoj tes laug tshuab , de laim cov tshuab luam ntawv , PCB loader , PCB unloader , nti mounter , SMT AOI tshuab , SMT SPI tshuab , SMT X-hluav taws xob tshuab, SMT los ua ke kab khoom siv, khoom siv PCB smt spare yam thiab lwm yam SMT cov cav koj xav tau, thov hu rau peb paub ntxiv:
Hangzhou NeoDen Technology Co., Ltd
Ntxiv: Lub Tsev 3, Diaoyu Industrial thiab Technology Park, No.8-2, Keji Avenue, District of Yuhang, Hangzhou , Suav teb
Tiv tauj peb: Steven Xiao
E-mail: steven@neodentech.com
Xov tooj: 86-18167133317
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