VS僽
һ c僽ą^(q)e
1ԭ^(q)e
FLASH GOLD õǻW(xu)eķ
PLANTING GOLDõ늽ԭ
2^^(q)e
늽(hu)늽](mi)ҪߵԒDzûķ
(ni)lPCB PADõǻķ
TABָʹ늽Ҳʹû
3ˇ^(q)e
僽һ,Ҫͨ,Ҫ.šкܶN,к軯,зwϵ,wϵЙ,}͵.PCBИI(y)ĶǷwϵ.
(W(xu)僽)Ҫͨ,ͨ^(gu)Һ(ni)ĻW(xu)(yng)ѽe.Ѓ(yu)ȱc(din),ͨ늲֮ͨ,늽ĺܺ,ֻҪL(zhng)r(sh)g,mİ.늽ˎˮUęC(j)(hu)ȻС.늽Ҫȫ匧(do)ͨ,Ҳme(x)ľ·.һܱ(0.2),ļȵ.Һõһ̶ֻU
늽ľ·Ҫc(din)
1늽cOSPĝ(rn)ஔ(dng)Ľaĝ(rn)PCB finishingõ
2늽ĺh(yun)ڻĺƽț](mi)л
3늽ҪڽָĥP(pn)Ҳ
ľ·Ҫc(din)
1(hu)ʽSɫ͑M⡣
2ӣ(hu)ɺӲ͑ͶV
3ֻкP(pn)懽څwЧ(yng)̖(ho)Ăݔ~Ӳ(hu)(du)̖(ho)|(zh)Ӱ
ʲôҪ僽
SIC ļɶԽ(li)ԽIC_ҲԽԽֱaˇyɼ(x)ĺP(pn)ƽ@ͽoSMTNb(li)yȣ⇊aĴÉshelf lifeܶ僽ýQ@Щ(wn)}
1. (du)ڱNbˇ䌦(du)06030402 СͱN?yn)麸P(pn)ƽֱP(gun)ϵaӡƹ|(zh)(du)|(zh)?jng)QӰԣ僽ڸܶȺͳСͱNˇЕr(sh)Ҋ(jin)
2. ԇAԪُ(gu)صӰǰӁ(li)RϾͺǽ(jng)Ҫώׂ(g)(g)²僽ĴÉ(shelf life)UaϽL(zhng)ܶԴҶ(l)f(shu)僽PCBڶȘAεijɱcUaϽo(w)ס
SԽ(li)Խgѽ(jng)3-4MILˎ(li)˽z·Ć(wn)}
S̖(ho)lԽ(li)ԽڅwЧ(yng)̖(ho)ڶ僌Ђݔ?sh)r(du)̖(ho)|(zh)ӰԽ@
څwЧ(yng)ָlĽڅڌ(do)ı(dng)
ʲôҪóQ僽φ(wn)}óPCBҪc(din):
1 c僽γɵľwY(ji)(gu)һӣ(hu)ʽSɫ^僽(li)f(shu)S͑M
2 c僽γɵľwY(ji)(gu)һӣ^僽(li)f(shu)(hu)ɺӲ͑ͶV
3 ֻкP(pn)懽څwЧ(yng)̖(ho)Ăݔ~Ӳ(hu)(du)̖(ho)|(zh)Ӱ
4 ^僽(li)f(shu)wY(ji)(gu)a(chn)
5 ֻкP(pn)懽Բ(hu)a(chn)ɽz
6 ֻкP(pn)懽Ծ·ϵ躸c~ӵĽY(ji)ϸι̡
7 a(b)r(sh)(hu)(du)ga(chn)Ӱ
8 c僽γɵľwY(ji)(gu)һđ(yng)ƣ(du)аĮa(chn)Ʒڰļӹͬr(sh)Ҳ?yn)僽ܛԳָĥ?br>9 ƽcÉc僽һӺ
ġ僽֮(yu)ȱc(din)
߲һӣ༴W(xu)ͨ^(gu)W(xu)߀ԭ(yng)ķһ僌ӣһ^ǻW(xu)懽ӳeһN_(d)^ĽӣһNÓQҲǽ༴ÓQһ^1--4Ӣ僽һֻ僽僵^ͽһ(du)Ҫ^ߵİƽҪȽҪЩһ㲻(hu)F(xin)Mbĺډ|F(xin)僽?yn)僌Ӽ^c(din)(qing)^߸
(wn)
1. 僽Ӣĸs(xi)?
: A. Electroless gold o(w)늽 Immersion gold (IG) Chemical gold Electro-less Nickel (EN)]
B. 늽 Electrolytic Gold ܛSoft (Bondable) gold Ӳ Hard gold
2. ô~(ǷҲûW(xu)߀ԭ)?~o(w)ճҪ懌(du)
:ض׃øߕr(sh)~֮g^(gu)懌migration߽|裬@(du)ָ懌(du)c~֮g֮migrationDiffusionЧãʱQ Diffusion Layer or Barrier metal 僽ǰ, U
3. ҂f(shu) Ҫ key pad Ӳ(֙C(j)keypad) ǿ ijһӲ ?
: Keypad ṩc(din) Ӳ|
4. Ӳܛ njڼӹ^(gu)̆?
û,߀ǽ߀僽ܛ,Ƿֻ wirebond Ӳֻڽָxx ; ӲܛƳό늽 , ;ֻҪͲ, | Ӳ, ָCard , Keypad,Ӌ(j). Ҫ(Wire bonding ) tܛ,ȡ僽. ٟo(w)늽Ƴ, " ^,ͨǴ懊a,ȡƽ̹b䃞(yu)c(din),o(w)UҪҲһ. ^,ɴ늽Ƴo(w)(do)늾x. û(ͨX)W(xu)ENP6-10Ӱ푵ӲWire BondҪӲtߜؕ(hu)Wedge Bond^(gu)Tgr(sh)Y(ji)Ϗ(qing)ȟo(w)
5. ʲô֙C(j) TOP BOT(1oz) ~ (hu)(ni)(0.5oz) ͬOZأ
@O(sh)Ӌ(j)늚,(ni)05.oz. ָǰl(f)ָͨɺ, 1oz. l(f)Ͽ05.oz.僺׃1oz