Na usoro nkePCBmmepụta ihe, mmepụta nke aSteel Stencil (nke a makwaara dị ka "stencil").A na-eme ya iji tinye tapawa solder nke ọma na oyi akwa nke PCB.Ihe akwa akwa akwa akwa, nke a na-akpọkwa "paste mask Layer," bụ akụkụ nke faịlụ PCB eji akọwa ọnọdụ na ụdị nke.tapawa solder.Nke a oyi akwa bụ anya tupuNkà na ụzụ elu ugwu (SMT)A na-eresị ihe ndị ahụ na PCB, na-egosi ebe ekwesịrị idowe tapawa ihe.N'oge usoro ire ere, stencil nchara na-ekpuchi akwa akwa akwa akwa, a na-etinyekwa tapawa nke ọma na paịlị PCB site na oghere dị na stencil ahụ, na-eme ka a na-agbanye nke ọma n'oge usoro mgbakọ na-esote.
Ya mere, akwa akwa akwa akwa bụ ihe dị mkpa n'ịmepụta stencil ígwè.N'oge mmalite nke nrụpụta PCB, a na-ezigara onye nrụpụta PCB ozi gbasara akwa akwa akwa akwa, onye na-emepụta stencil nchara kwekọrọ iji hụ na izi ezi na ntụkwasị obi nke usoro ire ere.
N'ime PCB (Bọọdụ Circuit Ebi ebi), "pastemask" (nke a makwaara dị ka "ihe mkpuchi solder" ma ọ bụ naanị "ihe nkpuchi") bụ oyi akwa dị oke mkpa.Ọ na-arụ ọrụ dị mkpa na usoro ịgbanye maka ịgbakọtaNgwa elu ugwu (SMDs).
Ọrụ nke stencil nchara bụ igbochi ka a na-etinye tapawa nchara n'ebe ebe a na-agaghị ere ere mgbe a na-ere ihe SMD.Tapawa solder bụ ihe eji ejikọta ihe SMD na paịlị PCB, akwa akwa pastemask na-arụkwa ọrụ dị ka "ihe mgbochi" iji hụ na a na-etinye tapawa solder naanị na mpaghara ebe a na-ere ere.
Nhazi nke oyi akwa pastemask dị oke mkpa na usoro nrụpụta PCB ka ọ na-emetụta àgwà ire ere yana n'ozuzu arụmọrụ nke ngwa SMD.N'oge imewe PCB, ndị na-emepụta kwesịrị iji nlezianya tụlee nhazi nke oyi akwa pastemask, na-ahụ na ọ kwadoro ya na ọkwa ndị ọzọ, dị ka oyi akwa na akwa akwa, iji kwe nkwa izi ezi na ntụkwasị obi nke usoro ire ere.
Nkọwapụta nkọwapụta maka ihe mkpuchi mkpuchi solder (Steel Stencil) na PCB:
Na PCB imewe na n'ichepụta, usoro nkọwapụta maka Solder mkpuchi Layer (nke a makwaara dị ka Steel Stencil) na-akọwakarị site ụkpụrụ ụlọ ọrụ na ndị nrụpụta chọrọ.Nke a bụ ụfọdụ nkọwapụta ihe eji eme ihe maka oyi akwa mkpuchi solder:
1. IPC-SM-840C: Nke a bụ ọkọlọtọ maka Solder Mask Layer nke IPC guzobere (Association Connecting Electronics Industries).Ọkọlọtọ ahụ na-akọwapụta arụmọrụ, njirimara anụ ahụ, ịdịte aka, ọkpụrụkpụ, na ihe ndị achọrọ maka ihe mkpuchi na-ere ihe.
2. Agba na Ụdị: The solder mask nwere ike ịbịa n'ụdị dị iche iche, dị kaỊkwanye ihe na-ere ikuku na-ekpo ọkụ (HASL) or Nickel immersion ọla edo na-enweghị eletrọnịkị(ENIG), na ụdị dị iche iche nwere ike ịnwe nkọwa nkọwa dị iche iche.
3. Mkpuchi nke solder mkpuchi Layer: The solder mkpuchi oyi akwa kwesịrị ikpuchi niile ebe na-achọ soldering nke components, mgbe huu kwesịrị ekwesị shielding nke ebe na-ekwesịghị soldered.Ihe mkpuchi ihe na-ere ihe kwesịrị izere ikpuchi ebe a na-ebunye akụrụngwa ma ọ bụ akara silk.
4. Idozi anya nke ihe mkpuchi mkpuchi solder: oyi akwa mkpuchi nke solder kwesịrị inwe nghọta dị mma iji hụ na visibiliti doro anya nke akụkụ nke paịlị na-ere ahịa na iji gbochie tapawa ihe na-ejupụta n'ime ebe a na-achọghị.
5. Ọkpụrụkpụ nke Solder Mask Layer: The ọkpụrụkpụ nke solder nkpuchi oyi akwa kwesịrị iso ọkọlọtọ chọrọ, na-emekarị n'ime a nso nke ọtụtụ iri puku kwuru iri micrometers.
6. Pin Izere: Ụfọdụ pụrụ iche components ma ọ bụ atụdo nwere ike ịnọgide na-ekpughe na solder nkpuchi oyi akwa izute kpọmkwem soldering chọrọ.N'ọnọdụ ndị dị otú ahụ, nkọwa nkpuchi ihe nkpuchi nwere ike ịchọ ịzere ngwa nkpuchi na-ere ihe na mpaghara ndị ahụ akọwapụtara.
Irube isi na nkọwa ndị a dị mkpa iji hụ na ịdị mma na izi ezi nke oyi akwa mkpuchi solder, si otú a na-emeziwanye ọnụego ihe ịga nke ọma na ntụkwasị obi nke nrụpụta PCB.Na mgbakwunye, ịrapagidesi ike na nkọwapụta ndị a na-enyere aka ịkwalite arụmọrụ nke PCB ma hụ na mgbakọ na ire nke ngwa SMD ziri ezi.Ịmekọrịta na onye nrụpụta na ịgbaso ụkpụrụ ndị dị mkpa n'oge usoro nhazi bụ ihe dị mkpa iji hụ na ịdị mma nke akwa akwa stencil ígwè.
Oge nzipu: Ọgọst-04-2023
