SMT Ntau Lawm Cov Khoom Pabcuam ntawm Qee Cov Lus Qhia

Nyob rau hauv cov txheej txheem SMT qhov chaw tsim khoom, feem ntau yuav tsum tau siv SMD nplaum, solder paste, stencil thiab lwm yam khoom siv, cov ntaub ntawv pabcuam hauv SMT tag nrho cov txheej txheem tsim khoom, cov khoom lag luam zoo, kev ua haujlwm ntau lawm ua lub luag haujlwm tseem ceeb.

1. Lub Sijhawm Cia (Shelf Life)

Raws li cov xwm txheej tau teev tseg, cov khoom siv lossis cov khoom lag luam tseem tuaj yeem ua tau raws li cov kev xav tau thiab tswj xyuas qhov ua tau zoo ntawm lub sijhawm cia.

2. Lub Sijhawm Ua Haujlwm (Lub Sijhawm Ua Haujlwm)

Chip adhesive, solder paste nyob rau hauv kev siv ua ntej raug rau qhov chaw ib puag ncig tseem tuaj yeem tswj tau cov tshuaj thiab lub cev ntawm lub sijhawm ntev tshaj plaws.

3. Viscosity (Viscosity)

Chip adhesive, solder paste nyob rau hauv lub ntuj drip ntawm cov khoom nplaum ntawm qhov poob qeeb.

4. Thixotropy (Thixotropy Ratio)

Chip nplaum thiab solder paste muaj cov yam ntxwv ntawm cov kua dej thaum extruded nyob rau hauv siab, thiab sai sai ua cov yas khoom tom qab extrusion los yog tso tseg tsis siv lub siab.Cov yam ntxwv no hu ua thixotropy.

5. Slumping (Slump)

Tom qab luam ntawv ntawm lubstencil tshuab luam ntawvvim lub ntiajteb txawj nqus thiab nto nro thiab kub nce los yog chaw nres tsheb lub sij hawm ntev dhau lawm thiab lwm yam yog vim li cas los ntawm qhov siab txo, nyob rau hauv qab cheeb tsam tshaj li ib thaj tsam ntawm lub slump phenomenon.

6. Kev nthuav dav

Qhov kev ncua deb uas cov nplaum kis tau ntawm chav tsev kub tom qab dispensing.

7. Adhesion (Tack)

Qhov loj ntawm adhesion ntawm solder paste rau cov khoom thiab kev hloov ntawm nws cov adhesion nrog kev hloov ntawm lub sij hawm cia tom qab luam ntawv ntawm solder paste.

8. Wetting (Wetting)

Lub molten solder nyob rau hauv lub tooj liab nto los ua ib tug uniform, du thiab unbroken lub xeev ntawm lub solder nyias txheej.

9. No-clean Solder Paste (No-clean Solder Paste)

Solder paste uas tsuas muaj ib qho kab ntawm qhov tsis muaj teeb meem tom qab soldering yam tsis tau ntxuav PCB.

10. Low Temperature Solder Paste (Tseem Kub Paste)

Solder paste nrog melting kub qis dua 163 ℃.