A yau za mu ci gaba da koyo game da hanya ta biyu na kera PCB SMT stencil: Laser Cutting.
Yanke Laser a halin yanzu shine mafi shaharar hanya don kera stencil na SMT. A cikin SMT karba-da-wuri sarrafa masana'antu, fiye da 95% na masana'antun, ciki har da mu, amfani da Laser yankan ga stencil samar.
1. Bayanin Ƙa'ida: Yanke Laser ya ƙunshi amfani da Laser don yanke inda ake buƙatar buɗaɗɗen buɗaɗɗen. Za'a iya daidaita bayanan kamar yadda ake buƙata don canza girman, kuma mafi kyawun sarrafa tsari zai inganta daidaiton buɗewar. Ganuwar rami na stencils-yanke laser suna tsaye.
2. Tsari Tsari: Yin fim don PCB → Gudanar da saye → Fayil ɗin bayanai → sarrafa bayanai → Yankewar Laser da hakowa → gogewa da gogewa na lantarki → Dubawa → Tensioning raga → Packaging {708
3. Features: Babban daidaito a cikin samar da bayanai, ƙananan tasiri daga dalilai masu mahimmanci; trapezoidal apertures sauƙaƙe rushewa; iya yankan daidai; matsakaicin farashi.
4. Hasara: Ana yin yankan ɗaya bayan ɗaya, wanda ke sa saurin samarwa ya ɗan yi jinkiri.
Ƙa'idar yankan Laser tana nunawa a cikin ƙananan hoton hagu na ƙasa. Na'ura tana sarrafa tsarin yankan da kyau kuma ya dace da samar da ƙananan ƙananan ramuka. Tun da Laser ne ke soke shi kai tsaye, bangon ramin ya fi na ginshiƙan sinadarai masu sinadarai, ba tare da siffa ta tsakiya ba, wanda ke da amfani ga cika man da ake solder a cikin ramukan stencil. Bugu da ƙari, saboda ƙaddamarwa daga gefe ɗaya zuwa wancan, ganuwar ramin za su kasance da sha'awar dabi'a, yin dukan ɓangaren ramin ramin tsarin trapezoidal, kamar yadda aka nuna a cikin ƙananan dama na ƙasa. Wannan bevel yana kusan daidai da rabin kauri na stencil.
Tsarin trapezoidal yana da amfani don sakin manna mai siyar, kuma ga ƙananan ramukan ramuka, zai iya cimma kyakkyawan siffar "bulo" ko "tsabar kudi". Wannan halayen ya dace da haɗuwa da ƙananan farar fata ko ƙananan ƙananan abubuwa. Saboda haka, don madaidaicin ɓangaren SMT taro, ana ba da shawarar stencil laser gabaɗaya.
A cikin labari na gaba, za mu gabatar da hanyar samar da lantarki a cikin PCB SMT stencil.
