Waa maxay sababta aan fiisaha ugu xirno PCB-ga?

Waa maxay sababta aan fiisaha ugu xirno PCB-ga?

Si loo daboolo shuruudaha macaamiisha waa in la xiraa daloollada looxa wareegga.Dhaqan badan ka dib, habka daloolka aluminium ee dhaqanka ah ayaa isbeddelaya, shabagga cad waxaa loo isticmaalaa in lagu dhammeeyo alxanka caabbinta iyo daloolka godka wareegga wareegga, taas oo ka dhigi karta wax-soo-saarka mid deggan iyo tayada la isku halleyn karo.

Via god ayaa door muhiim ah ka ciyaara isku xirka wareegyada.Iyadoo horumarinta warshadaha elektarooniga ah, waxay sidoo kale kor u qaadaysaa horumarinta PCB, waxayna soo bandhigtaa shuruudo sarePCB-abuurista iyo isu-ururintafarsamada.Tignoolajiyada daloolka godka ayaa la sameeyay, shuruudaha soo socdana waa in la buuxiyaa:

(1) Naxaasta ku jirta daloolku waa ku filan yahay, maaskarada alxanka waa la xiri karaa ama maya;

(2) Waa in ay jiraan daasad iyo rasaas gudaha daloolka, oo leh shuruudo dhumucdiisu tahay (4 microns), ma jiro alxanka caabbinta khad godka, sababa in daasadaha lagu qariyo godadka;

(3) Waa inuu jiraa dalool khad caabin ah oo alxanka ah oo ku dhex jira daloolka, kaas oo aan daah-furnayn, waana in aanay jirin giraan daasad ah, kuul iyo fidsan.

Iyadoo horumarinta alaabta elektarooniga ah ee jihada "iftiin, khafiif ah, gaaban iyo yar", PCB sidoo kale waxay u koraan dhinaca cufnaanta sare iyo dhibka sare.Sidaa darteed, tiro badan oo SMT iyo BGA PCBs ah ayaa soo muuqday, macaamiishuna waxay u baahan yihiin godadka godadka marka la rakibayo qaybaha, kuwaas oo inta badan leh shan hawlood:

(1) Si looga hortago wareegga gaaban ee ay keento daasad dhex gasha dusha element inta lagu jiro PCB in ka badan alxanka mawjada, gaar ahaan marka aan dhex daloolka on BGA suuf ah, marka hore waa in aan samayno dalool furka ka dibna dahaadhay dahab ah si ay u fududayso alxanka BGA. .

(2) Ka fogow haraaga qulqulka qulqulka ee godadka;

(3) Ka dib marka ay korto oogada iyo isku dhafka wershada elektaroonigga ah, PCB-gu waa in uu nuugo faakuumka si uu cadaadis xun ugu sameeyo mishiinka tijaabada;

(4) Ka-hortagga alxanka dusha sare inuu ku qulqulo godka, oo uu keeno alxan been ah oo saameeya buurta;

(5) Ka ilaali tusaha alxanka inuu soo baxo inta lagu jiro mowjadaha alxanka, oo keena wareeg gaaban.

Xaqiijinta tignoolajiyada godka fur ee daloolka

WaayoSMT PCB shirkalooxa, gaar ahaan ku rakibidda BGA iyo IC, via godka fur waa inuu ahaadaa mid fidsan, convex iyo concave lagu daray ama laga jaray 1mil, oo waa in aanay jirin daas cas oo ku yaal cidhifka daloolka;si loo daboolo shuruudaha macaamiisha, habka daloolka godka godka waxaa lagu tilmaami karaa multifarious, socodka dheer ee geedi socodka, xakamaynta habka adag, waxaa jira inta badan dhibaatooyinka sida hoos u dhaca saliidda inta lagu jiro heerka hawada kulul iyo tijaabada caabbinta saliidda cagaaran ee saliidda iyo qaraxa saliidda ka dib daawo.Marka loo eego shuruudaha dhabta ah ee wax-soo-saarka, waxaanu soo koobaynaa hababka kala duwan ee daloolka PCB, waxaanu samaynaa isbarbardhigga iyo faahfaahinta habka iyo faa'iidooyinka iyo khasaarooyinka:

Fiiro gaar ah: mabda'a shaqada ee heerkulbeegga hawada kulul waa in la isticmaalo hawo kulul si meesha looga saaro alxanka xad-dhaaf ah dusha guddiga wareegga daabacan iyo godka, iyo alxanka soo haray waxaa si siman loo daboolay on suufka, non xannibaya khadadka alxanka iyo dhibcood baakadaha dusha. , taas oo ah mid ka mid ah siyaabaha daaweynta dusha sare ee looxa wareegga daabacan.

1. Ku xidh habka daloolka ka dib marka la simo hawada kulul: alxanka caabbinta saxan → HAL → dalool fur → daawo.Habka xirid la'aanta waxaa loo qaataa wax soo saarka.Heerarka hawada kulul ka dib, shaashadda aluminium ama shaashadda xannibista khad ayaa loo isticmaalaa si loo dhamaystiro furaha daloolka ee dhammaan qalcadaha ay u baahan yihiin macaamiisha.Khadka daloolka furku wuxuu noqon karaa khad sawir-qaadis leh ama khad heerkulbeeg ah, xaaladda hubinta isla midabka filimka qoyan, khad dalooleedka fur ayaa ugu fiican in la isticmaalo khad la mid ah kan looxa.Habkani wuxuu xaqiijin karaa in daloolku uusan hoos u dhigi doonin saliidda ka dib marka hawada kulul la eego, laakiin way fududahay in la keeno khad daloolka fur si uu u wasakheeyo dusha saxanka oo aan sinnayn.Way u fududahay macaamiishu inay sababaan alxanka beenta ah inta lagu jiro korka (gaar ahaan BGA).Markaa, macaamiil badan ma aqbalaan habkan.

2. Ku xidh habka daloolka ka hor heerka hawada kulul: 2.1 dalool ku xidh xaashida aluminium, adkee, shiid saxanka, ka dibna u wareeji sawirada.Habkani wuxuu isticmaalaa mishiinka qodista CNC si uu u soo saaro xaashida aluminiumka ee u baahan in lagu xidho dalool, samee saxan shaashadda, dalool fur, hubi in daloolku buuxo, khad dalool xidhid, khad heerkulbeeye sidoo kale waa la isticmaali karaa.Sifooyinkeedu waa inay ahaadaan adayg sare, isbeddel yar oo xabagta ah, iyo ku dheggan oo wanaagsan oo leh gidaarka daloolka.Habka tignoolajiyadu waa sida soo socota: pretreatment → dalool fur → saxan shiidi → qaab wareejin → etching → alxanka caabbinta dusha saxan.Habkani wuxuu hubin karaa in daloolka daloolka daloolka uu siman yahay, iyo heerkulbeegga hawada kululi ma yeelan doonto dhibaatooyin tayo leh sida qaraxa saliidda iyo hoos u dhaca saliidda ee cidhifka daloolka.Si kastaba ha ahaatee, habkani wuxuu u baahan yahay dhumuc hal mar ah oo naxaas ah si dhumucda naxaasta ee gidaarka daloolka looga dhigo mid la kulmo heerka macaamiisha.Sidaa darteed, waxay leedahay shuruudo sare oo loogu talagalay dhejinta naxaasta ee saxanka oo dhan iyo waxqabadka Booqday Furimaha Dagaalka, si loo hubiyo in xabagta dusha naxaasta ah si buuxda loo saaro, oogada naxaasta waa nadiif oo aan nijaasayn.Warshado badan oo PCB ah ma laha geedi socod dhumuc hal mar ah oo naxaas ah, iyo waxqabadka qalabku ma buuxin karo shuruudaha, markaa habkan ayaa ah mid dhif ah oo lagu isticmaalo warshadaha PCB.

(Shabadhka xariirta ee maran)

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