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paste in hole Technology

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suresh211pcb

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Hi all,
please explain the paste in hole technology methode & if we do this methode Whether it will be provide good soldering Strength.

regrads
suresh
 

HI,
Solder paste is used for good soldering purpose for SMD components. its also called stencil . I never heard it is used for through hole component. smd packages have very small pad where it should be soldered properly.
Regards
Praveen Bhat
 



Can you explain what is stencil and what is solder paste. link is is not helpful.
Regards
Praveen Bhat
 

solder paste is just you can say extra fine quality of solder what we usually use, it is in creamy form, use in SMD soldering ... for its advantage you can search on Google a lot is there...

stencil is a sheet (metallic , plastic etc) which is made specific for you PCB and which has openings corresponding to your components pad ( SMT components) ... the idea here is that it is impossible to place solder paste on pads which are were small as you might end up in shorting pads.. so we place stencil over our PCB, align it corresponding to our pads, put some solder paste and sweep it like wiper over the stencil, all the solder gets deposited on pads through openings, in a matter of seconds. cost is much but effective when you are doing mass production of a particular PCB so that you need just one stencil and use it again and again... Remember it is PCB specific ( Obviously!)
 
Do a search on google for:
pin in paste process

http://www.dek.com/dek.nsf/dek/process_pin_paste
http://www.youtube.com/watch?v=votD5Y8TA08

Look round here for info on stencils:
http://www.tecan.co.uk/smt/

Solder paste is a load of balls, literaly mixed with some flux, the size of you balls is an inportant factor in your assembly process. For smaller components you need smaller balls, a rule of thumb is three to five balls should fit accross the width of your smallest opening in the solder paste screen
 

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