Ị maara ihe dị iche n'etiti ihe dị iche iche nke PCB osisi?

- Site na ụwa pcb,

Ngwakọta nke ihe, nke a makwaara dị ka ọkụ ọkụ, nkwụsị nke onwe, ọkụ ọkụ, ọkụ ọkụ, ọkụ ọkụ, ọkụ ọkụ na ihe ndị ọzọ combustibility, bụ iji nyochaa ike nke ihe na-eguzogide combustion.

A na-eji ọkụ na-ekpo ọkụ na-ekpo ọkụ na-ekpo ọkụ na-ekpo ọkụ na-ekpo ọkụ nke na-eme ka ihe ndị a chọrọ, na-ewepụkwa ọkụ ahụ mgbe oge a kara aka.A na-enyocha ọkwa ọkụ dị ka ogo nke combustion nke sample.Enwere ọkwa atọ.The kehoraizin ule usoro nke sample na-ekewa n'ime FH1, FH2 , FH3 larịị atọ, vetikal ule usoro na-ekewa n'ime FV0, FV1, VF2.

A na-ekewa bọọdụ PCB siri ike na bọọdụ HB na bọọdụ V0.

Mpempe akwụkwọ HB nwere obere ire ere ma a na-ejikarị ya maka bọọdụ nwere otu akụkụ.

Board VO nwere nnukwu ọkụ na-adịgide adịgide, a na-ejikarị ya na bọọdụ nwere akụkụ abụọ na nke ọtụtụ.

Ụdị bọọdụ PCB a nke na-emezu ihe achọrọ ọkụ ọkụ V-1 na-aghọ bọọdụ FR-4.

V-0, V-1, na V-2 bụ akara ule anaghị egbochi ọkụ.

Igwe sekit ga-abụrịrị ọkụ na-eguzogide ọkụ, enweghị ike ire ọkụ n'otu ọnọdụ okpomọkụ, mana enwere ike ime ka ọ dị nro.A na-akpọ ebe okpomọkụ n'oge a iko mgbanwe okpomọkụ (Tg point), na uru a metụtara nkwụsi ike akụkụ nke osisi PCB.

Gịnị bụ elu Tg PCB circuit osisi na uru nke iji a elu Tg PCB?

Mgbe okpomọkụ nke nnukwu Tg ebi ebi na-ebili na mpaghara ụfọdụ, mkpụrụ ga-agbanwe site na "steeti iko" gaa na "steeti roba".A na-akpọ okpomọkụ n'oge a iko mgbanwe okpomọkụ (Tg) nke osisi.N'ikwu ya n'ụzọ ọzọ, Tg bụ okpomọkụ kachasị elu nke mkpụrụ ahụ na-ejigidesi ike.

Kedu ụdị bọọdụ PCB akọwapụtara?

Ekewara ya site na ọkwa ọkwa site na ala ruo elu dị ka ndị a:

94HB – 94VO – 22F – CEM-1 – CEM-3 – FR-4

Nkọwa bụ ndị a:

94HB: kaadiboodu nkịtị, ọ bụghị ọkụ (ihe ọkwa kacha ala, ịkụ ọkpọ, enweghị ike iji ya dị ka bọọdụ ọkọnọ ike)

94V0: kaadiboodu ire ọkụ (Die Punching)

22F: bọọdụ fiber ọkara nwere akụkụ nwere otu (ịkụ ọkpọ)

CEM-1: osisi fiberglass nwere otu akụkụ (mkpọpu kọmputa dị mkpa, ọ bụghị ịnwụ ịkụ ọkpọ)

CEM-3: bọọdụ fiber okpukpu abụọ nwere akụkụ abụọ (ma ewezuga kaadiboodu nwere akụkụ abụọ, ọ bụ ihe njedebe kacha ala nke osisi nwere akụkụ abụọ, dị mfe.

Enwere ike iji ihe a mee ihe maka okpukpu abụọ, nke bụ 5 ~ 10 yuan / square mita dị ọnụ ala karịa FR-4)

FR-4: bọọdụ fiberglass nwere akụkụ abụọ

Gịnị bụ elu Tg PCB sekit osisi na uru nke iji a elu Tg PCB.Mgbe okpomọkụ na-ebili na mpaghara ụfọdụ, mkpụrụ osisi ga-agbanwe site na "steeti iko" gaa na "steeti roba".

A na-akpọ okpomọkụ n'oge ahụ iko mgbanwe okpomọkụ (Tg) nke efere.N'ikwu ya n'ụzọ ọzọ, Tg bụ okpomọkụ kachasị elu (°C) nke mkpụrụ ahụ na-ejigidesi ike.Nke ahụ bụ, nkịtị PCB mkpụrụ ihe ọ bụghị nanị na-emepụta nro, deformation, agbaze na ndị ọzọ phenomena na elu okpomọkụ, ma na-egosi a nkọ ọdịda na n'ibu na eletriki e ji mara (m na-eche na ị na-achọghị ịhụ nhazi ọkwa nke PCB mbadamba. ma hụ ọnọdụ a na ngwaahịa nke gị).

Efere Tg izugbe karịrị ogo 130, Tg dị elu na-adịkarị karịa ogo 170, na ọkara Tg bụ ihe karịrị ogo 150.

A na-akpọkarị mbadamba PCB ndị e biri ebi na Tg ≥ 170C.

Ka Tg nke mkpụrụ osisi na-abawanye, a ga-eme ka ọ dịkwuo mma ma na-emeziwanye okpomọkụ na-eguzogide okpomọkụ, mmiri na-eguzogide mmiri, nguzogide kemịkalụ, nkwụsi ike na njirimara ndị ọzọ nke bọọdụ a na-ebipụta.Ọnụ ahịa TG dị elu, ka mma na-eguzogide okpomọkụ nke osisi ahụ, karịsịa na usoro enweghị ndu, ebe ngwa Tg dị elu na-adịkarị.

High Tg na-ezo aka na oke okpomọkụ.Site na mmepe ngwa ngwa nke ụlọ ọrụ elektrọnik, ọkachasị ngwaahịa eletrọnịkị nke kọmpụta na-anọchi anya ya, mmepe nke arụmọrụ dị elu na ọtụtụ multilayers chọrọ nnukwu nguzogide ihe ọkụkụ nke PCB dị ka ihe dị mkpa na-ekwe nkwa.Mwepụta na mmepe nke teknụzụ na-arị elu dị elu nke SMT na CMT nọchitere anya emeela ka PCB dịkwuo ike na nkwado nke oke okpomọkụ na-eguzogide nke ihe ndị dị na obere oghere, mma wiring na thinning.

Ya mere, ihe dị iche n'etiti izugbe FR-4 na elu Tg FR-4: ọ bụ na-ekpo ọkụ na steeti, karịsịa mgbe mmiri absorption.

N'okpuru okpomọkụ, e nwere ọdịiche dị na ike ígwè ọrụ, nkwụsi ike nke akụkụ, adhesion, absorption water, thermal decomposition, and thermal expansion of the things.Ngwaahịa Tg dị elu dị mma karịa ihe mkpụrụ PCB nkịtị.

N'ime afọ ndị na-adịbeghị anya, ọnụ ọgụgụ nke ndị ahịa na-achọ mmepụta nke elu Tg mbadamba nkume amụbawo kwa afọ.

Site na mmepe na ọganihu na-aga n'ihu nke teknụzụ eletrọnịkị, a na-etinye ihe ọhụrụ a chọrọ mgbe niile maka ihe mpempe akwụkwọ sekit a na-ebipụta, si otú ahụ na-akwalite mmepe na-aga n'ihu nke ụkpụrụ laminate ọla kọpa.Ka ọ dị ugbu a, ụkpụrụ bụ isi maka ihe ndị substrate bụ ndị a.

① Ụkpụrụ mba Ka ọ dị ugbu a, ụkpụrụ mba nke obodo m maka nhazi nke PCB ihe maka mkpụrụ gụnyere GB/

T4721-47221992 na GB4723-4725-1992, ụkpụrụ laminate ọla kọpa na Taiwan, China bụ ụkpụrụ CNS, nke dabere na ọkọlọtọ JI nke Japan wee nye ya na 1983.

②Ụkpụrụ mba ndị ọzọ gụnyere: ụkpụrụ JIS Japanese, ASTM American, NEMA, MIL, IPC, ANSI, ụkpụrụ UL, ụkpụrụ British Bs, ụkpụrụ German DIN na VDE, ụkpụrụ French NFC na UTE, na Canadian CSA Standards, Australia AS ọkọlọtọ, nke mbụ. Ụkpụrụ FOCT nke Soviet Union, ọkọlọtọ IEC mba ụwa, wdg.

Ndị na-eweta ihe PCB izizi bụ ihe a na-ejikarị eme ihe: Shengyi \ Jiantao \ International, wdg.

● Nabata akwụkwọ: protel autocad powerpcb orcad gerber ma ọ bụ ezigbo bọọdụ oyiri, wdg.

● Ụdị mpempe akwụkwọ: CEM-1, CEM-3 FR4, ihe ndị dị elu TG;

● Oke osisi kacha: 600mm * 700mm (24000mil * 27500mil)

● Ọkpụrụkpụ osisi: 0.4mm-4.0mm (15.75mil-157.5mil)

● Ọnụ ọgụgụ kachasị elu nke nhazi nhazi: 16Layers

● ọkpụrụkpụ oyi akwa ọla kọpa: 0.5-4.0(oz)

● Nlegide ọkpụrụkpụ nke bọọdụ emechara: +/- 0.1mm(4mil)

● Ịmepụta nha nha: igwe igwe kọmputa: 0.15mm (mil 6) die efere ịkụ ọkpọ: 0.10mm (4mil)

● Obere ahịrị obosara / oghere: 0.1mm (4mil) Ikike njikwa obosara ahịrị: <+-20%

● Dayameta oghere kacha nta nke ngwaahịa emechara: 0.25mm (mil 10)

Dayameta oghere kacha nta nke ngwaahịa emechara: 0.9mm (35mil)

Nkwenye oghere agwụla: PTH: +-0.075mm(3mil)

NPTH: +-0.05mm(2mil)

● Ọkpụkpụ ọla kọpa agwụla olulu: 18-25um (0.71-0.99mil)

● Obere oghere SMT kacha nta: 0.15mm (6mil)

● Mkpuchi elu: ọla edo imi mmiri kemịkalụ, ịgba agba agba, ọla edo nwere nickel (mmiri / ọla edo dị nro), gluu silk na-acha anụnụ anụnụ, wdg.

● Ọkpụrụkpụ nke ihe mkpuchi na-ere ihe na osisi: 10-30μm (0.4-1.2mil)

● Ike peeling: 1.5N/mm (59N/mil)

● Isi ike nke ihe mkpuchi na-ere ihe:> 5H

● Ikike oghere nkwụnye ihe mkpuchi ihe nkpuchi: 0.3-0.8mm (12mil-30mil)

● Dielectric mgbe niile: ε= 2.1-10.0

● Mkpuchi mkpuchi: 10KΩ-20MΩ

● Ihe mgbochi njirimara: 60 ohm± 10%

● Igwe ọkụ ọkụ: 288 ℃, 10 sk

● Akwụkwọ akụkọ nke bọọdụ emechara: <0.7%

● Ngwa ngwaahịa: ngwa nkwurịta okwu, ngwá electronic ụgbọala, ngwá ọrụ, usoro nhazi ụwa, kọmputa, MP4, ọkụ ọkụ, ngwa ụlọ, wdg.