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      Solder paste knowledge training - selection of solder paste - Dongguan Lvzhidao

      作者:Lvzhidao solder factory 2019-11-07 0

      Today, lvzhidao solder factory has carried out the solder paste knowledge training for the business department, so that the salesmen can know more about lvzhidao solder paste products, better serve the customers and meet their needs.

      錫膏

      Today's solder paste knowledge training includes:

      Introduction of solder paste

              Solder paste is a mixture of uniform and stable tin alloy powder, solder paste and special additives. Alloy connection can be formed after welding. This kind of material is very suitable for reliable welding of automatic production of surface mount. Solder paste is the product of high technology of modern electronic industry.


              The composition of solder paste is generally 90% tin alloy powder, 10% solder paste and other additives.


      Selection of solder paste classification

      Common solder paste alloy table

      Alloy composition

      Industry common name

      Liquid temperature

      Solid temperature℃

      Sn63 / Pb37

      6337  Sn63

      183

      183

      Sn62 / Pb36 / Ag2

      6236Ag2  Ag2

      179

      179

      Sn62.8 / Pb36 .8/ Ag0.4

      Ag0.4

      179

      183

      Sn10 / Pb88 / Ag2

      88   (高溫Ag2

      290

      268

      Sn5 / Pb92.5 / Ag2.5

      Ag2.5

      280

      280

      Sn96.5 / Ag3.0 / Cu0.5

      SAC305  305

      219

      217

      Sn98.5 / Ag1.0 / Cu0.5

      SAC105  105

      217

      227

      Sn99 / Ag0.3/ Cu0.7

      SAC0307  0307

      227

      229

      Sn42 / Bi58

      Bi58  4258

      138

      138

      Sn64 / Bi35/Ag1

      Bi35   Ag1

      138

      187


      Solder paste alloys are selected according to lead or not

      Is there any lead in it

      Alloy composition

      Lead alloy

      Sn63 / Pb37

      Sn62.8 / Pb36.8 / Ag0.4

      Sn60Pb40,Sn55Pb45Sn50Pb50

      Sn62.8 / Pb36 .8/ Ag0.4

      Sn 63Pb36.8Ag0.2

      High lead Superalloy

      It is currently exempt from RoHS

      Sn10 / Pb90

      Sn5 / Pb92.5 / Ag2.5

      Lead free alloy

      Sn96.5 / Ag3.0 / Cu0.5

      Sn99 / Ag0.3/ Cu0.7

      Sn98.5 / Ag1/ Cu0.5

      Sn64 / Bi35/Ag1

      Sn64.7Bi35Ag0.3

      Sn42 / Bi58


      Solder paste alloy is selected according to melting point temperature

      Alloy composition

      Melting point temperature

      Liquid temperature

      Solid temperature℃

      Sn63 / Pb37

      Ordinary moderate temperature class


      Most processes are applicable


      183

      183

      Sn62 / Pb36 / Ag2

      179

      179

      Sn62.8 / Pb36 .8/ Ag0.4

      179

      183

      Sn10 / Pb90

      Ultra high temperature


      Used for semiconductor products with high temperature resistance


      290

      268

      Sn5 / Pb92.5 / Ag2.5

      280

      280

      Sn96.5 / Ag3.0 / Cu0.5

      High temperature lead free


      It is suitable for most lead-free processes


      219

      217

      Sn99 / Ag0.3/ Cu0.7

      227

      229

      Sn42 / Bi58

      Low temperature lead free


      It is suitable for the welding of lead-free materials which are not resistant to high temperature and the radiator which has large heat absorption or the secondary migration welding


      138

      138

      Sn64 / Bi35/Ag1

      138

      187


      Selection of solder paste alloy by welding process classification

      welding technology

      Alloy composition

      SMT welding process

      Sn63 / Pb37

      Sn96.5 / Ag3.0 / Cu0.5

      Sn62 / Pb36 / Ag2

      Sn99 / Ag0.3/ Cu0.7

      Sn62.8 / Pb36 .8/ Ag0.4

      Sn42 / Bi58

      Sn64 / Bi35/Ag1

      Semiconductor welding process

      Sn10 / Pb88 / Ag2

      Sn5 / Pb92.5 / Ag2.5

      Through hole welding process

      Sn63 / Pb37

      Sn42 / Bi58

      Sn62.8 / Pb36 .8/ Ag0.4

      Sn64 / Bi35/Ag1

      Sn99 / Ag0.3/ Cu0.7

      Radiator welding process

      Sn63 / Pb37

      Sn42 / Bi58 Sn64


      Sn63Bi35/Ag1

      hot-bar


      Sn64 / Bi35/Ag1

      Sn96.5 / Ag3.0/ Cu0.5


      All categories of solder paste under this topic will be shared next time. In addition, this topic also tells about solder paste particles, solder paste mesh and other knowledge points.


      The remaining two themes

      Please read the following article

      How to use solder paste

      Setting of reflow temperature of lead free solder paste



      Dongguan lvzhidao Metal Co., Ltd. [lvzhidao solder factory] has a complete production system, producing and selling solder paste, solder wire, solder bar, lead-free solder bar, lead-free solder wire, lead-free solder paste and other products. For more details, please visit the official website of Lvzhidao:www.cdcxmc.com。


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