Matsalolin aiki na lafiya PCB samar

Tare da haɓaka masana’antar lantarki, haɗin abubuwan haɗin lantarki ya fi girma kuma ya fi girma, kuma ƙaramin ƙarami ne da ƙarami, kuma ana amfani da fakitin nau’in BGA. Sabili da haka, da’irar PCB za ta kasance ƙarami da ƙarami, kuma adadin yadudduka za su yi yawa. Rage faɗin layi da tazarar layi shine yin mafi kyawun amfani da iyakance yanki, kuma ƙara adadin yadudduka shine yin amfani da sarari. Babban abin da ke kewaye da katako a nan gaba shine mil mil 2-3 ko ƙasa da hakan.

Gabaɗaya an yi imanin cewa duk lokacin da hukumar kera ke ƙaruwa ko ɗaga darajar, dole ne a saka hannun jari sau ɗaya, kuma babban jarin yana da yawa. A takaice dai, ana samar da allon kewaya mai daraja ta kayan aiki masu inganci. Koyaya, ba kowane kamfani bane zai iya samun babban saka hannun jari, kuma yana ɗaukar lokaci da kuɗi da yawa don yin gwaji don tattara bayanan aiwatarwa da samar da gwaji bayan saka hannun jari. Misali, da alama hanya ce mafi kyau don yin gwajin gwaji da samarwa gwargwadon halin da ake ciki na kasuwancin, sannan yanke shawara ko saka hannun jari gwargwadon ainihin yanayin da yanayin kasuwa. Wannan takarda ta yi bayani dalla -dalla iyakokin faɗin layin bakin ciki wanda za a iya samarwa a ƙarƙashin yanayin kayan aiki na yau da kullun, da kuma yanayi da hanyoyin samar da layin bakin ciki.

Ana iya raba tsarin samarwa gabaɗaya zuwa hanyar rami mai rufe murfin da hanyar electroplating mai hoto, duka biyun suna da fa’idodi da rashin amfanin su. Da’irar da aka samu ta hanyar hanyar narkar da sinadarin acid yana da daidaituwa, wanda ya dace da sarrafa rashin ƙarfi da ƙarancin gurɓatar muhalli, amma idan rami ya karye, za a fasa shi; Gudanar da lalata lalata Alkali yana da sauƙi, amma layin bai daidaita ba kuma gurɓataccen muhalli ma yana da girma.

Da farko, busasshen fim shine mafi mahimmancin ɓangaren samar da layi. Fina -finan bushe -bushe daban -daban suna da ƙuduri daban -daban, amma gabaɗaya na iya nuna girman layi da tazarar layin 2mil / 2mil bayan fallasawa. The ƙuduri na talakawa daukan hotuna inji iya isa 2mil. Gabaɗaya, girman layi da tazarar layi a cikin wannan kewayon ba zai haifar da matsaloli ba. A tazarar layin layi na 4mil / 4mil ko sama, alaƙar da ke tsakanin matsin lamba da maida hankali kan maganin ruwa ba ta da kyau. A ƙasa da nisan layin layin 3mil / 3mil, bututun shine mabuɗin don shafar ƙudurin. Gabaɗaya, ana amfani da bututun mai sifar fan, kuma ana iya aiwatar da ci gaban kawai lokacin da matsa lamba ya kusan 3bar.

Kodayake ƙarfin fallasa yana da babban tasiri akan layi, yawancin fina -finan bushe da ake amfani dasu a kasuwa gabaɗaya suna da fa’ida mai yawa. Ana iya rarrabe shi a matakin 12-18 (sarkin fallasa matakin 25) ko matakin 7-9 (matakin fallasa matakin 21). Gabaɗaya magana, ƙaramin kuzarin fallasa yana dacewa da ƙudurin. Koyaya, lokacin da kuzari yayi ƙasa sosai, ƙura da abubuwa iri -iri a cikin iska suna da babban tasiri a kanta, wanda ke haifar da buɗewa (lalatawar acid) ko gajeriyar madaidaiciya (lalata alkali) a cikin tsarin daga baya Saboda haka, ainihin samarwa ya kamata haɗe tare da tsabtar ɗakin duhu, don zaɓar mafi ƙarancin faɗin layin da nisan layin layin allon da za a iya samarwa gwargwadon ainihin yanayin.

Sakamakon yanayi masu tasowa akan ƙuduri ya fi bayyana a yayin da layin ya yi ƙarami. Lokacin da layin ya wuce 4.0mil/4.0mil, yanayin haɓaka (saurin, maida hankali kan maganin ruwa, matsin lamba, da sauransu) Tasirin ba a bayyane yake ba; lokacin da layin ke 2.0mil/2.0/mil, siffar da matsin bututun suna taka muhimmiyar rawa a kan ko za a iya haɓaka layin daidai. A wannan lokacin, saurin haɓaka na iya raguwa sosai. A lokaci guda, maida hankali na maganin ruwa yana da tasiri kan bayyanar layin. Dalili mai yuwuwa shine cewa matsin bututun mai sifar fan yana da girma, kuma har yanzu motsawar tana iya kaiwa zuwa kasan busasshen fim lokacin da tazarar layin yayi ƙanƙanta Ci gaba: matsawar bututun mai ɗan ƙarami ne, don haka yana da wahala don haɓaka layin mai kyau. Jagorancin sauran farantin yana da tasiri mai mahimmanci akan ƙuduri da bangon gefen busasshen fim.

Injinan fallasa daban -daban suna da ƙuduri daban -daban. A halin yanzu, injin fallasa ɗaya yana da sanyaya iska, tushen hasken yanki, ɗayan yana sanyaya ruwa kuma yana nuna tushen haske. Matsakaicin ƙudurin sa shine 4mil. Koyaya, gwaje -gwajen sun nuna cewa zai iya cimma 3.0mil/3.0mil ba tare da daidaitawa ko aiki na musamman ba; yana iya kaiwa ma 0.2mil/0.2/mil; lokacin da aka rage kuzari, ana kuma iya rarrabe shi da 1.5mil/1.5mil, amma aikin yakamata a yi hankali Bugu da ƙari, babu wani bambanci a bayyane tsakanin ƙudurin saman Mylar da saman gilashi a cikin gwaji.

Don lalata alkali, koyaushe akwai tasirin naman kaza bayan zaɓin lantarki, wanda gabaɗaya a bayyane yake kuma ba a bayyane yake ba. Misali, idan layin ya fi girma fiye da 4.0mil/4.0mil, tasirin naman kaza ya fi ƙanƙanta.

Lokacin da layin yake 2.0mil/2.0mil, tasirin yana da girma sosai. Fim ɗin busasshen yana haifar da sifar namomin kaza saboda ambaliyar gubar da tin a lokacin zaɓin lantarki, kuma an ɗaure busasshen fim ɗin a ciki, wanda ke da wahalar cire fim ɗin. Mafitar ita ce: 1. Yi amfani da electroplating bugun jini don yin suturar sutura; 2. Yi amfani da busasshen fim mai kauri, fim ɗin bushewa gabaɗaya shine 35-38 microns, kuma kauri mai kauri shine 50-55 microns, wanda ya fi tsada. Wannan busasshen fim yana ƙarƙashin acid etching 3. Low electroplating na yanzu. Amma waɗannan hanyoyin ba su cika ba. A zahiri, yana da wahala a sami cikakkiyar hanya.

Saboda tasirin naman kaza, cire labule na bakin ciki yana da matsala sosai. Saboda lalacewar sinadarin sodium hydroxide zuwa gubar da tin zai zama a bayyane a 2.0mil/2.0mil, ana iya warware shi ta hanyar kaɗa gubar da kwano da rage yawan sinadarin sodium hydroxide yayin electroplating.

A cikin daidaita alkaline, faɗin layin da saurin sun bambanta don sifofi daban -daban na layi da saurin daban. Idan hukumar da’irar ba ta da buƙatu na musamman kan kaurin layin da aka samar, za a yi amfani da allon da ke da kauri na 0.25oz jan ƙarfe don yin shi, ko kuma za a zana wani sashi na jan ƙarfe na 0.5oz. za ta zama siriri, gubar gubar za ta yi kauri, da dai sauransu duk suna taka rawa wajen yin layuka masu kyau tare da etching alkaline, kuma bututun zai zama mai siffar fan. Gabaɗaya ana amfani da bututun bututun ƙarfe Kawai 4.0mil/4.0mil za a iya cimma.

A lokacin etching acid, iri ɗaya da alkali etching shine cewa faɗin layin da saurin siffar layi ya bambanta, amma gabaɗaya, yayin bushewar acid, fim ɗin bushe yana da sauƙin karya ko ƙyalli fim ɗin abin rufe fuska da fim ɗin farfajiya a cikin watsawa da hanyoyin da suka gabata. Don haka, yakamata a kula sosai yayin samarwa. Sakamakon layi na etching acid ya fi alkalin etching, babu tasirin naman kaza, lalacewar gefen ƙasa da alkalin etching, kuma tasirin bututun mai sifar fan ya fito fili fiye da bututun ƙarfe. .

A cikin tsarin samarwa, saurin da zazzabi na rufin fim, tsabtace farantin farantin karfe da tsabtar fim ɗin diazo suna da babban tasiri akan ƙimar cancantar, wanda ke da mahimmanci musamman ga sigogin murfin fim ɗin acid da ƙyallen farantin. farfajiya; don alkali etching, tsabtace fallasa yana da mahimmanci.

Saboda haka, ana la’akari da cewa kayan aiki na yau da kullun na iya samar da allon 3.0mil/3.0mil (yana nufin faɗin layin fim da tazara) ba tare da daidaitawa ta musamman ba; duk da haka, ƙimar cancantar tana shafar ƙwarewar da matakin aiki na muhalli da ma’aikata. Rushewar Alkali ya dace don samar da allon kewaye da ke ƙasa da 3.0mil/3.0mil. Sai dai cewa jan ƙarfe mara tushe ƙarami ne zuwa wani matsayi, tasirin bututun mai sifar fan yana da kyau fiye da na bututun ƙarfe.