Mukuita kwePCBkugadzira, kugadzira aSteel Stencil (inozivikanwawo se "stencil")inoitwa kunyatsoisa solder paste pane solder paste layer yePCB.Iyo solder paste layer, inonziwo "paste mask layer," chikamu chePCB dhizaini faira rinoshandiswa kutsanangura zvinzvimbo uye zvimiro zve.solder paste.Iyi layer inoonekwa pamberi pepamusoro pekusimudza tekinoroji (SMT)zvikamu zvinotengeswa paPCB, zvichiratidza panofanira kuiswa solder paste.Munguva yekushambadzira, stencil yesimbi inovhara solder paste layer, uye solder paste inoiswa chaizvo paPCB pads kuburikidza nemaburi ari pa stencil, kuve nechokwadi chekutengesa kwakaringana panguva inotevera chikamu chegungano.
Naizvozvo, iyo solder paste layer chinhu chakakosha mukugadzira stencil yesimbi.Mumatanho ekutanga ekugadzira PCB, ruzivo nezve solder paste layer inotumirwa kumugadziri wePCB, uyo anogadzira inoenderana stencil yesimbi kuti ave nechokwadi chechokwadi uye kuvimbika kweiyo solder process.
MuPCB (Printed Circuit Board) dhizaini, iyo "pastemask" (inozivikanwawo se "solder paste mask" kana kungoti "solder mask") yakakosha.Inoita basa rakakosha mukugadzira solder yekuunganidzapamusoro pemidziyo yekumisikidza (SMDs).
Basa re stencil yesimbi ndeyekudzivirira solder paste kubva pakuiswa kunzvimbo uko soldering haifaniri kuitika kana solder SMD components.Solder paste ndicho chinhu chinoshandiswa kubatanidza SMD zvikamu kune PCB pads, uye iyo pasmask layer inoita se "chipingamupinyi" kuve nechokwadi chekuti solder paste inoiswa chete kune dzakanangana nzvimbo dzekutengesa.
Iyo dhizaini yepasimesk layer yakakosha zvakanyanya muPCB yekugadzira maitiro sezvo ichipesvedzera zvakananga kunaka kwekutengesa uye kuita kwese kwezvikamu zveSMD.Munguva yePCB dhizaini, vagadziri vanofanirwa kunyatso tarisisa marongero epastemask layer, vachiona kurongeka kwayo nemamwe mazinga, senge pad layer uye component layer, kuvimbisa chokwadi uye kuvimbika kweiyo solder process.
Madhizaini Madhizaini eiyo Solder Mask Layer (Simbi Stencil) muPCB:
MuPCB dhizaini nekugadzira, maitiro eiyo Solder Mask Layer (inozivikanwawo seSimbi Stencil) anowanzo kutsanangurwa neindasitiri zviyero uye zvinodiwa nemugadziri.Heano mamwe akajairwa dhizaini eiyo Solder Mask Layer:
1. IPC-SM-840C: Iyi ndiyo chiyero cheSolder Mask Layer yakagadzwa neIPC (Association Connecting Electronics Industries).Iyo chiyero inotaridza mashandiro, maitiro emuviri, kusimba, ukobvu, uye solderability zvinodiwa kune solder mask.
2. Rudzi uye Rudzi: Iyo solder mask inogona kuuya mumhando dzakasiyana, sengeHot Air Solder Leveling (HASL) or Electroless Nickel Kunyudza Goridhe(ENIG), uye mhando dzakasiyana dzinogona kunge dziine zvirevo zvakasiyana.
3. Kuvharwa kweSolder Mask Layer: Iyo solder mask layer inofanira kuvhara nzvimbo dzose dzinoda kusungirirwa kwezvikamu, apo ichichengetedza kudzivirirwa kwakakodzera kwenzvimbo dzisingafaniri kutengeswa.Iyo solder mask layer inofanirwawo kudzivirira kuvhara chikamu chekumisikidza nzvimbo kana silk-screen mamaka.
4. Kujeka kweSolder Mask Layer: Iyo solder mask layer inofanirwa kuve nekujekesa kwakanaka kuti ive nechokwadi chekuonekwa kwakajeka kwemicheto ye solder pads uye kudzivirira solder paste kubva mukupfachukira munzvimbo dzisingadiwe.
5. Hukobvu hweSolder Mask Layer: Ukobvu hwemasolder mask layer hunofanirwa kuenderana nezvinodiwa, kazhinji mukati mehuwandu hwemakumi akati wandei ema micrometer.
6. Pini Kunzvenga: Zvimwe zvikamu zvakakosha kana mapini angangoda kuramba akafumurwa mune solder mask layer kuti isangane nezvinodiwa zvekusodha.Mumamiriro ezvinhu akadaro, iyo solder mask inotsanangurwa ingangoda kudzivirira kushandiswa kweiyo solder mask munzvimbo idzodzo.
Kutevedzera izvi zvakatemwa kwakakosha kuve nechokwadi chemhando uye kurongeka kweiyo solder mask layer, nekudaro kuvandudza mwero wekubudirira uye kuvimbika kwePCB kugadzira.Pamusoro pezvo, kuomerera kune izvi zvakatemwa kunobatsira kukwirisa mashandiro ePCB uye kuve nechokwadi kuungana kwakaringana uye kutengeswa kwezvikamu zveSMD.Kudyidzana nemugadziri uye kutevedzera zviyero zvinoenderana panguva yekugadzira danho rakakosha mukuona kunaka kwesimbi stencil layer.
Nguva yekutumira: Aug-04-2023
