Brazing & High-Temperature Soldering

High-Temperature Soldering & Brazing

Indium Corporation offers high-performance soldering materials for power semiconductors and other applications in harsh environment.
Indium Corporation is a leading joining and bonding materials innovator for medical, aerospace, optoelectronics, and automotive applications. When even 10 ppm of contamination can cause process and application failures – quality counts. Indium Corporation casts our alloys, which enables us to closely control the process from start to finish and ensure purity.With over 200 alloys available, we have alloy solutions for temperatures up to 1,100°C.
Brazing & High-Temperature Soldering
High Temp Scale

High Temperature Products

Lead-free options from Indium Corporation

Gold Solders

Gold based alloys offer strong bond strength, excellent corrosion and oxidation resistance, and good thermal and electrical transfer at the braze joint.

Sintering Products

Indium Corporation’s QuickSinter silver sintering pastes are high metal-loading materials designed to fit easily into a dispense process with no change of deposition equipment. The pastes can also use fast “reflow-like” (RFL) sintering processes to form strong joints on many standard leadframe, DBC, and IPM pad finishes, and will bond strongly to die with Ag, Au, or Cu surfaces.

Silver-Based High Temp Alloys

High thermal and electrical conductivity, capillaries very well into joints, and holds up well in applications with lots of stress and with CTE mismatches.

  Attributes Alloys Temperature
Gold-Based Alloys Strong bond strength, excellent corrosion and oxidation resistance, and good thermal and electrial transfer at the braze joint. Indalloy®182 (80Au/20Sn)
Indalloy®183 (88Au/12Ge)
Indalloy®178 (82Au/18In)
Indalloy®195 (80Au/20Cu)
Braze Indalloy®B955 (50Au/50Cu)
Braze Indalloy®B9902 (65Cu/35Au)
Indalloy®200 (100Au)
96.8Au3.2Si used for die-attach
Indalloy®270 (75Au/25Sn)
Indalloy®269 (78Au/22Sn)
Indalloy®271 (79Au/21Sn)
280°C Eutectic
356°C Eutectic
Solidus 451°C / Liquidus 485°C
891°C Eutectic
Solidus 955°C / Liquidus 970°C
Solidus 990°C / Liquidus 1010°C
1064°C Eutectic
363°C Eutectic
Solidus 278°C / Liquidus 332°C
Solidus 278°C / Liquidus 301°C
Solidus 278°C / Liquidus 289°C
Silver-Based Alloys High thermal and electrical conductivity, capillaries very well into joints, and holds up well in applications with lots of stress and with CTE mismatches. Braze Indalloy®B625 (61.5Ag / 24Cu / 14.5In)
Braze Indalloy®B6851 (63Ag / 27Cu / 10In)
Indalloy®193 (72Ag / 28Cu)
Braze Indalloy®B962 (99.99Ag)
Solidus 625°C / Liquidus 705°C
Solidus 685°C / Liquidus 730°C
780°C Eutectic
962°C Eutectic
  Standard Materials °C
Comments Sn Ag Sb Au Bi Ge Solidus Liquidus
Lower Tj IGBT usage 96.5 3.5         221°C Eutectic
Also known as "J-alloy" 65 25 10       233°C Eutectic
Commonly used in step-soldering processes 95   5       237°C 240°C
Highest Sb content possible in standard Sn/Sb wire 91.5   8.5       241°C 248°C
Commonly used in step-soldering processes 90   10       243°C 257°C
Highest melting standard Sn/Sb alloy 86   14          
Very poor solder-ability   11     89   262°C 360°C
Very high tensile strength and thermal / electrical conductivities 20     80     280°C Eutectic
Usable for very high Tj die-attach such as SiC       88   12 356°C Eutectic