Kev paub yooj yim ntawm hluav taws xob soldering hlau vuam (welding txoj cai thiab txheej txheem vuam)
Nrog rau kev nrawm ntawm kev ntim khoom hloov tshiab rau cov khoom siv hluav taws xob, thawj hom kev ntxig ncaj qha tau hloov mus rau hom tiaj tiaj, thiab cov hlua txuas kuj tau hloov los ntawm FPC soft boards. Qhov tsis kam thiab capacitance ntawm cov khoom tau dhau los ntawm 1206080506030402 thiab tam sim no tau tsiv mus rau 0201 hom mount tiaj tiaj. Tom qab BGA ntim, Bluetooth thev naus laus zis tau siv, uas tsis muaj qhov tshwj xeeb qhia tau hais tias kev txhim kho ntawm cov khoom siv hluav taws xob tau txav mus rau hauv kev ua haujlwm me me thiab kev ua haujlwm me me, thiab qhov nyuaj ntawm phau ntawv vuam kuj tau nce ntxiv, Ib qho kev tsis saib xyuas thaum vuam tuaj yeem ua rau cov khoom puas lossis ua rau cov khoom siv tsis zoo.
Yog li ntawd, cov neeg ua haujlwm hauv pem hauv ntej ntawm cov neeg siv vuam vuam yuav tsum muaj qee yam kev nkag siab ntawm cov qauv vuam, cov txheej txheem vuam, cov txheej txheem vuam, kev ntsuas vuam zoo, thiab cov txheej txheem hauv hluav taws xob.
1, Vuam txoj cai ntawm hluav taws xob soldering hlau
Tin welding yog ib txoj kev tshawb fawb uas siv cov cua sov soldering hlau kom yaj cov khoom siv hlau, thiab tom qab ntawd, nrog kev pab los ntawm cov hlau nplaum, nws ntws mus rau hauv cov hlau kom welded. Tom qab txias, nws tsim ib qho khoom thiab txhim khu kev qha vuam taw tes.
Thaum lub solder yog ua los ntawm tin txhuas alloy thiab vuam nto yog ua los ntawm tooj liab, lub solder thawj wets lub vuam nto. Nrog rau qhov tshwm sim ntawm ntub dej tshwm sim, lub solder maj diffuses ntawm cov hlau tooj, tsim ib tug adhesion txheej ntawm kev sib cuag nto ntawm lub solder thiab hlau tooj liab, ua rau ob tug khov kho. Yog li ntawd, soldering yog ua tiav los ntawm peb lub cev thiab tshuaj txheej txheem: wetting, diffusion thiab metallurgy.
1. Kev ntub dej: Cov txheej txheem ntub dej yog hais txog kev siv lub zog capillary kom diffuse lub melted solder raws lub zoo concave convex thiab crystalline qhov khoob ntawm qhov chaw ntawm lub hauv paus hlau, tsim ib txheej adhesion rau ntawm qhov chaw ntawm lub hauv paus hlau, ua tus solder thiab cov atoms ntawm lub hauv paus hlau nyob ze rau ib leeg, mus txog qhov deb ntawm lub atomic quab yuam ua.
Ib puag ncig tej yam kev mob uas ua rau ntub dej: Qhov saum npoo ntawm cov khoom siv welded yuav tsum huv si thiab tsis muaj oxides los yog cov pa phem.
Daim duab piv txwv: Muab dej tso rau ntawm nplooj nplooj los ua cov dej ntws tawm txhais tau hais tias dej tsis tuaj yeem moisten cov paj. Tso dej rau ntawm cov paj rwb thiab nws yuav nkag mus rau hauv cov paj rwb, uas txhais tau hais tias dej tuaj yeem moisten cov paj rwb.
2. Diffusion: Nrog rau cov txheej txheem ntub dej, qhov tshwm sim ntawm kev sib nrig sib txawv ntawm cov solder thiab lub hauv paus hlau atoms pib tshwm sim. Feem ntau, cov atoms nyob rau hauv lub thermal vibrational lub xeev nyob rau hauv lub lattice lattice, thaum kub nce. Kev siv zog ntawm atomic kev ua haujlwm ua rau cov atoms nyob rau hauv lub melted solder thiab lub hauv paus hlau hla kev sib cuag nto thiab nkag mus rau hauv lub lattice ntawm ib leeg. Qhov ceev thiab tus naj npawb ntawm atoms 'kev txav yog nyob ntawm cov cua kub thiab lub sijhawm.
3. Metallurgical bonding: Vim muaj kev sib nrig sib txawv ntawm cov solder thiab lub hauv paus hlau, ib qho nruab nrab txheej - ib tug hlau compound - yog tsim los ntawm ob lub hlau. Txhawm rau kom tau txais cov pob qij txha zoo, cov hlau sib txuas yuav tsum tau tsim ntawm cov welded puag hlau thiab cov khoom siv kom ua tiav cov khoom siv hlau sib txuas ntawm lub hauv paus hlau.
