Kwamitin kewaye na PCB tawada gabaɗaya an kasu kashi uku, bi da bi, PCB layin etching tawada, walda tawada da tawada rubutu. Wasu sune iskar gas mai gudana (wanda kuma ake kira tawada carbon mai gudana), mai azurfa mai sarrafa kai (wanda kuma ake kira manna azurfa na azurfa), nau’ikan nau’ikan janar guda biyu kaɗan ne.

PCB photosensitive etching tawada

Da farko, tawada etching na layin PCB. Abun kayan PCB ɗin shine farantin farantin jan ƙarfe, kuma akwai mayafin jan ƙarfe akansa. Yana buƙatar tawada mai kaifin hankali akan bugun allo, sannan ana warkar da shi ta hanyar haɓakawa, yana cire wurin da ba a bayyana ba, sannan ana shigar da shi. Wannan layin etching tawada, galibi don kariya, etching mai kyau layi, bayan amfani da sodium hydroxide ruwa mai ruwa don cire tawada. Yawancin allon da’irar etching tawada shuɗi ce, don haka ana kiranta shi da man shuɗi mai layi ko mai shuɗi mai ruwan shuɗi, wasu kayan aikin ƙarfe na ƙarfe na kayan masarufi suma za su yi amfani da wannan tawada, mutum ɗaya zai kira shi manne mai ɗaci, a zahiri, ya sha bamban sosai da farantin bugawa tare da manne mai mahimmanci.

Biyu, PCB waldi tawada

Nau’in tawada na biyu shine a mai da hankali akai, wato, PCB circuit board welding tawada, wanda kuma aka sani da tawada walda. Taken Solder shine babban allon PCB shine babban amfani da tawada. Layer na koren fenti da muke gani akan allon da’irar shine ainihin tawada mai toshe tawada.

Dangane da yanayin warkewa, tawada mai siyarwa yana da tawada mai haɓaka hoto, zafi mai warkar da yanayin zafi, da hasken UV yana warkar da tawada UV. Kuma gwargwadon farantin farantin, da tawada mai walƙiya mai ƙarfi na PCB, FPC taushi mai walda tawada, da tawada waldi na aluminium, ana iya amfani da tawada farantin aluminium a farantin yumbu.

Tawada mai siyarwa mai ɗaukar hoto shine maganin UV, bugun allo, yana buƙatar yin burodi bayan haɓakawa. Gabaɗaya ana amfani da su don yin kowane nau’in katako mai ƙarfi na PCB, jirgi mai taushi tare da madaidaiciyar kushin kewaye ban da fim ɗin bushe shima zai yi amfani da tawada mai taushi. Kuma tawada thermosetting, ana buga shi kai tsaye bayan yin burodi. Na kowa shine tawada eriyar eriyar wayar hannu, allon tsinken farin farin waldi. Tawada UV, man kore na UV ya zama ruwan dare gama gari, buƙatun gabaɗaya ba manyan allon kewaye ba ne ko za a yi amfani da babban allon keɓaɓɓen kera. Ink na UV, tawada mai ɗaukar hoto, tawada mai ƙyalƙyali, bambanci uku, buƙatun tawada mai ɗaukar hoto suna da girman gaske, sannan tawada thermosetting, sannan tawada ta UV, gabaɗaya magana, adhesion tawada UV zai zama mara kyau, madaidaicin tawada mai ɗaukar hoto ya fi girma.

Uku, tawada rubutun PCB

Nau’in tawada na uku shine tawada rubutu, tawada rubutu a bugu na allon kewaye, galibi don buga haruffa da alamomi. Tawada harafin gama -gari fari ne da baƙar fata, ana amfani da farin fiye, kusan duk allon kewaye ban da farin solder Layer an buga shi da farin tawada rubutu. Aluminium substrate, allon tsiri na fitila, fitila ta baya, da sauransu, saboda amfani da tawada mai siyarwa, don haka haruffan da ke sama sun yi amfani da tawada rubutun baki.

Masu kera allon keɓaɓɓun keɓaɓɓu saboda buƙatun abokan ciniki, za su yi amfani da tawada mai launin rawaya ko wani launi daban -daban, amma saboda da’irar rubuta takarda tawada ta yi ƙanƙanta sosai, masana’antun tawada da yawa ba sa son zuwa samarwa, don haka rubutu zai son tawada launi na musamman yana da wahalar samu, bayar da shawarar tawada walda don yin hujja, aibi shine tawada walda lokacin amfani da rubutun tawada, Za a sami sabon abu na asarar mai.

Tawada rubutu galibi tawada rubutu ne mai zafi, wasu za su yi amfani da tawada rubutun warkar da UV. Yawancin masana’antun tawada sun samar da farar tawada ta UV, kamar Kawashima UVM-5 shine mai maganin UV mai warkar da fari.

PCB circuit board production galibi ana amfani da shi a cikin nau’ikan tawada guda uku da ke sama, to menene matsayin waɗannan nau’ikan tawada iri uku?

Ana amfani da tawada mai ɗaukar hoto ta musamman don kare murfin tagulla a kan allon da’irar da ba ta buƙatar sakawa. Yana da tasirin etching juriya, acid da alkali juriya da electroplating juriya.

Biyu, walda tawada kuma ana amfani dashi azaman rawar kariya, rufi, juriya na reflow, juriya ga zinare, zinare, kwano, azurfa da feshin gishiri. Hakanan yana iya kare da’irar murfin tagulla akan allon da’irar a cikin amfani na gaba da haɓaka rayuwar hukumar kewaye.

Uku, rawar tawada rubutu idan aka kwatanta da biyun da suka gabata, rawar ba ta da yawa, galibi azaman alamar alama ko zane don amfani.