Mun gabatar da abin rufe fuska na PCB, to menene abin rufe fuska na PCB?
Manna abin rufe fuska. Ana amfani dashi don na'urar sanyawa na SMT (Surface-Mount Technology) don sanya abubuwan da aka gyara. Samfurin mashin manna ya dace da pads na duk abubuwan da aka ɗora a saman, kuma girmansa daidai yake da saman saman da ƙasa na allon. An shirya shi don aiwatar da ƙirƙirar stencil da ƙwanƙwasa bugu.
A cikin mahallin ayyukan masana'antu na PCB, abin rufe fuska na solder da abin rufe fuska suna da ayyuka daban-daban.
Solder Mask, wanda kuma aka sani da koren mai, Layer na kariya ne da ake amfani da shi a saman saman tagulla na PCB inda ba a buƙatar siyarwa. Babban aikinsa shi ne hana solder daga kwarara zuwa wuraren da ba a sayar da shi ba yayin aikin taro, ta yadda za a guje wa gajeren wando ko mahaɗin solder mara kyau. Solder mask yawanci ana yin shi daga resin epoxy, wanda ke ba da kariya ga da'irorin jan ƙarfe daga iskar shaka da gurɓatawa, kuma yana haɓaka kaddarorin rufin PCB. Launi na solder mask ne yawanci kore, amma kuma yana iya zama blue, baki, fari, ja, da dai sauransu A PCB zane, solder mask yawanci wakilta a matsayin korau image, ma'ana cewa bayan da mask ta siffar da aka canjawa wuri zuwa ga. allo, ita ce tagulla da aka fallasa.
Manna Mask, wanda kuma ake magana da shi azaman solder paste Layer ko stencil Layer, ana amfani dashi yayin aiwatar da Fasaha-Mount Technology (SMT). Ana amfani da abin rufe fuska don ƙirƙirar stencil, kuma ramukan da ke cikin stencil sun dace da pad ɗin solder akan PCB inda za'a sanya na'urorin Dutsen-Mount (SMDs). A lokacin aikin SMT, ana buga manna solder ta stencil akan pads na PCB don shirya abubuwan da aka makala. Mask ɗin manna yana girma don dacewa da ma'auni na pads ɗin mai siyarwa, yana tabbatar da cewa ana amfani da manna mai siyarwa kawai a inda ake buƙatar siyar da kayan. Abin rufe fuska na manna yana taimakawa daidai saka adadin adadin da ya dace don tsarin siyarwar.
A taƙaice, abin rufe fuska an ƙera shi ne don hana siyarwar da ba'a so da kuma kare PCB, yayin da ake amfani da abin rufe fuska don shafa man siyar zuwa takamaiman wurare don sauƙaƙe aikin siyarwar. Dukansu suna da mahimmanci a masana'antar PCB, amma suna hidima daban-daban kuma ana amfani da su a cikin mahallin daban-daban.
