–Ku isi ya pcb,

Gutwikwa kw'ibikoresho, bizwi kandi ko bita flame retardancy, kuzimya, kurwanya umuriro, kurwanya umuriro, kurwanya umuriro, gucana no gutwikwa, ni ugusuzuma ubushobozi bwibikoresho byo kurwanya gutwikwa.

Icyitegererezo cyibikoresho byaka byaka hamwe numuriro wujuje ibisabwa, kandi urumuri rukurwaho nyuma yigihe cyagenwe.Urwego rwo gucana rusuzumwa ukurikije urwego rwo gutwika icyitegererezo.Hariho inzego eshatu.Uburyo bwa test ya horizontal yicyitegererezo igabanijwemo FH1, FH2, FH3 urwego rwa gatatu, uburyo bwikizamini cya vertical bugabanijwemo FV0, FV1, VF2.

Ikibaho gikomeye cya PCB kigabanyijemo ikibaho cya HB na V0.

Urupapuro rwa HB rufite umuriro muke kandi rukoreshwa cyane kubibaho.

VO ikibaho gifite flame retardancy kandi ikoreshwa cyane muburyo bubiri kandi buringaniye

Ubu bwoko bwubuyobozi bwa PCB bujuje ibyangombwa bisabwa kugirango umuriro wa V-1 uhinduke FR-4.

V-0, V-1, na V-2 ni amanota adafite umuriro.

Ikibaho cyumuzunguruko kigomba kuba cyaka umuriro, ntigishobora gutwikwa nubushyuhe runaka, ariko gishobora koroshya gusa.Ubushyuhe muri iki gihe bwitwa ubushyuhe bwikirahure (Tg point), kandi ako gaciro kajyanye nuburinganire bwimiterere yibibaho bya PCB.

Nibihe birebire bya Tg PCB byumuzunguruko nibyiza byo gukoresha Tg PCB ndende?

Iyo ubushyuhe bwikibaho kinini cya Tg cyanditse kizamuka mukarere runaka, substrate izahinduka kuva "ikirahuri" ikajya kuri "reberi".Ubushyuhe muri iki gihe bwitwa ubushyuhe bwikirahure (Tg) bwibibaho.Muyandi magambo, Tg nubushyuhe bwo hejuru aho substrate ikomeza gukomera.

Ni ubuhe bwoko bwihariye bwibibaho bya PCB?

Igabanijwe nu ntera kuva hasi kugeza hejuru kuburyo bukurikira:

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

Ibisobanuro ni ibi bikurikira:

94HB: ikarito isanzwe, ntabwo irinda umuriro (ibikoresho byo hasi cyane, bipfa gukubita, ntibishobora gukoreshwa nkikibaho cyo gutanga amashanyarazi)

94V0: Ikarito ya Flame Retardant Ikarita (Gupfa)

22F: Ikibaho kimwe cya kabiri cyikirahure fibre (gupfa gukubita)

CEM-1: Ikibaho cya fiberglass imwe (gucukura mudasobwa birakenewe, ntabwo bipfa gukubita)

C.

Ibi bikoresho birashobora gukoreshwa muburyo bubiri, ni 5 ~ 10 yuan / metero kare ihendutse kuruta FR-4)

FR-4: Ikibaho cya fiberglass ebyiri

Ikibaho cyumuzunguruko kigomba kuba cyaka umuriro, ntigishobora gutwikwa nubushyuhe runaka, ariko gishobora koroshya gusa.Ubushyuhe muri iki gihe bwitwa ubushyuhe bwikirahure (Tg point), kandi ako gaciro kajyanye nuburinganire bwimiterere yibibaho bya PCB.

Nibihe birebire bya Tg PCB byumuzunguruko nibyiza byo gukoresha Tg PCB ndende.Iyo ubushyuhe buzamutse mukarere runaka, substrate izahinduka kuva "ikirahuri" ihinduka "reberi".

Ubushyuhe muri kiriya gihe bwitwa ubushyuhe bwikirahure (Tg) bwisahani.Muyandi magambo, Tg nubushyuhe bwo hejuru (° C) aho substrate ikomeza gukomera.Nukuvuga ko ibikoresho bisanzwe bya PCB bidatanga gusa koroshya, guhindura ibintu, gushonga nibindi bintu mubushyuhe bwinshi, ariko kandi bikerekana kugabanuka gukabije mubiranga imashini n'amashanyarazi (ngira ngo ntushaka kubona ibyiciro byubuyobozi bwa PCB hanyuma urebe iki kibazo mubicuruzwa byawe).

Isahani rusange ya Tg irenga dogere 130, Tg muremure muri rusange irenga dogere 170, naho Tg yo hagati ni dogere zirenga 150.

Mubisanzwe PCB yacapishijwe imbaho ​​hamwe na Tg ≥ 170 ° C bita imbaho ​​ndende za Tg.

Mugihe Tg ya substrate yiyongera, kurwanya ubushyuhe, kurwanya ubushuhe, kurwanya imiti, gutuza nibindi biranga ikibaho cyacapwe bizanozwa kandi bitezimbere.Hejuru ya TG agaciro, niko arwanya ubushyuhe bwikibaho, cyane cyane muburyo butayobora, aho Tg yo hejuru ikoreshwa cyane.

High Tg bivuga ubushyuhe bwinshi.Hamwe niterambere ryihuse ryinganda za elegitoroniki, cyane cyane ibicuruzwa bya elegitoronike bihagarariwe na mudasobwa, iterambere ryimikorere ihanitse kandi ryinshi rirasaba ubushyuhe bwinshi bwibikoresho bya substrate ya PCB nkingwate ikomeye.Kugaragara no guteza imbere tekinoroji yo kwishyiriraho cyane ihagarariwe na SMT na CMT byatumye PCB irushaho gutandukana no gushyigikirwa nubushyuhe bukabije bw’imiterere ya substrate mubijyanye na aperture ntoya, insinga nziza, no kunanuka.

Kubwibyo, itandukaniro riri hagati ya FR-4 rusange na Tg FR-4 ndende: iri mubihe bishyushye, cyane cyane nyuma yo kwinjiza amazi.

Munsi yubushyuhe, hariho itandukaniro mumbaraga zumukanishi, gutuza kurwego, gukomera, kwinjiza amazi, kubora kwinshi, no kwagura ubushyuhe bwibikoresho.Ibicuruzwa byinshi bya Tg biragaragara ko ari byiza kuruta ibikoresho bisanzwe bya PCB.

Mu myaka yashize, umubare wabakiriya basaba kubyara ibicuruzwa byinshi byanditseho Tg byiyongereye uko umwaka utashye.

Hamwe niterambere hamwe niterambere ryiterambere rya tekinoloji ya elegitoronike, ibisabwa bishya bihora bishyirwa mubikorwa byacapwe byumuzunguruko wacapwe, bityo bigateza imbere iterambere ryikomeza ryumuringa wambaye umuringa.Kugeza ubu, ibipimo ngenderwaho byibikoresho bya substrate nibi bikurikira.

Standards Ibipimo byigihugu Kugeza ubu, igihugu cyanjye cyigihugu mugushira mubikorwa ibikoresho bya PCB kubutaka harimo GB /

T4721-47221992 na GB4723-4725-1992, ibipimo by'umuringa byambaye laminate muri Tayiwani, mu Bushinwa ni ibipimo bya CNS, bishingiye ku gipimo cya JIs cy'Ubuyapani kandi cyatanzwe mu 1983.

TherIbindi bipimo byigihugu birimo: Ibipimo by’Ubuyapani JIS, ASTM y'Abanyamerika, NEMA, MIL, IPc, ANSI, UL, Ibipimo bya Bs by’Ubwongereza, Ubudage bwa DIN na VDE, Ubufaransa NFC na UTE, hamwe na CSA yo muri Kanada, AS, AS Ubumwe bwa Soviet Soviet FOCT standard, amahame mpuzamahanga ya IEC, nibindi.

Abatanga ibikoresho byumwimerere bya PCB bishushanyije nibisanzwe kandi bikoreshwa: Shengyi \ Jiantao \ International, nibindi.

. Emera inyandiko: protel autocad powerpcb orcad gerber cyangwa ikibaho nyacyo kopi, nibindi.

Types Ubwoko bw'impapuro: CEM-1, CEM-3 FR4, ibikoresho bya TG bihanitse;

Size Ingano ntarengwa y'ubutegetsi: 600mm * 700mm (24000mil * 27500mil)

Ness Gutunganya ikibaho cyububiko: 0.4mm-4.0mm (15.75mil-157.5mil)

Numubare munini wo gutunganya ibice: 16Abalayiki

Enc Uburebure bw'umuringa wuzuye: 0.5-4.0 (oz)

● Kurangiza kwihanganira ikibaho: +/- 0.1mm (4mil)

Gushiraho kwihanganira ingano: gusya mudasobwa: 0.15mm (6mil) bipfa gukubita isahani: 0,10mm (4mil)

Uburebure bw'umurongo ntarengwa / intera: 0.1mm (4mil) Ubushobozi bwo kugenzura umurongo: <+ - 20%

Umurambararo ntarengwa wa diameter y'ibicuruzwa byarangiye: 0,25mm (10mil)

Nibura umwobo wa diameter wibicuruzwa byarangiye: 0.9mm (35mil)

Kwihanganira umwobo urangiye: PTH: + -0.075mm (3mil)

NPTH: + -0.05mm (2mil)

Wall Umwobo wuzuye urukuta rw'umuringa: 18-25um (0.71-0.99mil)

Acing Umwanya muto muto wa SMT: 0.15mm (6mil)

Ating Ubuso bwa shitingi: zahabu yo kwibiza mu miti, gutera amabati, zahabu isize nikel (amazi / zahabu yoroshye), ecran ya silike yubururu, nibindi.

● Ubunini bwa mask yagurishijwe ku kibaho: 10-30 mm (0.4-1.2mil)

Strength Imbaraga zo gukuramo: 1.5N / mm (59N / mil)

● Gukomera kwa mask yo kugurisha:> 5H

Cap Ububiko bwa masike ya plaque yububiko: 0.3-0.8mm (12mil-30mil)

Constant Dielectric ihoraho: ε = 2.1-10.0

Resistance Kurwanya insulation: 10KΩ-20MΩ

Imp Impedance iranga: 60 ohm ± 10%

Shock Ubushuhe bukabije: 288 ℃, amasegonda 10

Urupapuro rwibibaho byarangiye: <0.7%

Application Gusaba ibicuruzwa: ibikoresho byitumanaho, ibikoresho bya elegitoroniki, ibikoresho, sisitemu yo kwisi yose, mudasobwa, MP4, amashanyarazi, ibikoresho byo murugo, nibindi.