Solders
Specialty Solder Spheres
Indium Corporation is a supplier of specialty solder and brazing spheres in small to mid-size volumes. We offer a wide variety of alloys and sizes from around 0.004” (100 microns) to 0.078” (1.98mm), depending on the alloy. Melting points range from below 90°C to over 700°C.
Powered by Indium Corporation
- Low-Oxide Sphere
- Tight Diameter Tolerance Control
- Tight Alloy Composition Control
Overview
Features & Benefits
We supply many of the leading suppliers of medical, transportation and automotive, military and aerospace, high-end mobile devices, and computing equipment.
Our customers come to us because we can supply consistently high-quality materials for precision assembly challenges.
- Accurate diameters
- Wide range of alloys (<90°C to >700°C)
- Capable of supplying quantities from 1 sphere to >20 million per month
- Clean manufacturing and processing ensures low-oxide levels with no organic contamination
- Whiteroom finishing and packaging ensures continuity of cleanliness
- Pure metals ensure high-quality finished spheres
- Manufactured in IATF-16949 certified facilities
Solder Sphere Products
Pb-Free Alloys
| Alloy | Indalloy® # | Melting Point Solidus (°C | Melting Point Liquidus (°C) | Min (Inches)* | Max (Inches)* | Min (µm)* | Max (µm)* |
|---|---|---|---|---|---|---|---|
| InSn50 | 1 | 118 | 125 | 0.004 | 0.030 | 102 | 762 |
| InSn48 (In/Sn eutectic) | 1E | 118 | 0.004 | 0.035 | 102 | 889 | |
| BiSn42 (Bi/Sn eutectic) | 281 | 138 | 0.008 | 0.109 | 203 | 2,769 | |
| BiSn42Ag1 | 282 | 139 | 140 | 0.008 | 0.030 | 203 | 762 |
| 99.99In (“Pure Indium”) | 4 | 157 | 0.004 | 0.050 | 102 | 1,270 | |
| SnIn20Ag2.8 (Pb-free “Sn63”) | 227 | 175 | 187 | 0.004 | 0.030 | 102 | 762 |
| SnAg3Cu0.5 (SAC305) | 256 | 217 | 220 | 0.004 | 0.065 | 102 | 1,651 |
| SnAg4Cu0.5 (SAC405) | 2562 | 217 | 225 | 0.004 | 0.035 | 102 | 889 |
| SnAg4 | 121 | 221 | 228 | 0.004 | 0.021 | 102 | 533 |
| SnAg5 | 132 | 221 | 240 | 0.004 | 0.032 | 102 | 800 |
| AuSn20 (Au/Sn eutectic) | 182 | 280 | 0.004 | 0.039 | 102 | 991 |
*Approximate Manufacturable Diameter Range
Pb-Containing Alloys
| Alloy | Indalloy® # | Melting Point Solidus (°C | Melting Point Liquidus (°C) | Min (Inches)* | Max (Inches)* | Min (µm)* | Max (µm)* |
|---|---|---|---|---|---|---|---|
| SnPb46Bi8 | 240 | 160 | 173 | 0.010 | 0.030 | 254 | 762 |
| SnPb36Ag2 (Sn62) | Sn62 | 179 | 181 | 0.004 | 0.030 | 102 | 762 |
| SnPb37 (Sn63) | 106 | 183 | 0.004 | 0.050 | 102 | 1,270 | |
| PbIn25 | 110 | 183 | 192 | 0.004 | 0.027 | 102 | 686 |
| PbIn40 | 206 | 197 | 231 | 0.004 | 0.020 | 102 | 508 |
| PbSn10 | 159 | 275 | 302 | 0.004 | 0.040 | 102 | 1,016 |
*Approximate Manufacturable Diameter Range
Product Data Sheets
Specialty Solder Spheres PDS 97549 (A4) R8.pdf
Specialty Solder Spheres PDS 97549 R8.pdf
Related Applications
Flip-Chip
A crucial technique in advanced semiconductor
SiP & Heterogeneous Integration Assembly (HIA)
System-in-package (SiP) and heterogeneous integration solutions
Ball-Attach
Including both water-wash and no-clean ball-attach
2.5D & 3D Packaging
Techniques to incorporate multiple dies in a single
PCB Assembly
Proven and cutting-edge materials for PCB assembly
Rework
Our rework solutions include solder wire, TACflux, and
Related Markets
Related Products
Indium Ingot
Purity up to 99.99995%, various Indium Ingot shapes & forms
Liquid Alloys
Explore versatile liquid alloys with low melting
Solder Alloys
Wide range of solder alloys with melting temperatures
Solder Preforms
Solder preforms: versatile materials solving sealing & thermal
Expert Support for Reliable Results
Do you have technical questions or sales inquiries? Our dedicated team is here to help. “From One Engineer to Another®” isn’t just our motto—it’s our commitment to delivering exceptional service. We’re ready when you are. Let’s connect!
Interconnect Reliability: From the Chip to the System
Interconnect reliability is critical to the reliability of semiconductor packaging and electronic systems. If we look at the life cycle from the chip to the system—from IC design, wafer fab,
Minimizing Graping
Folks, This post is an excerpt on graping, fromIndium Corporation'sThe Printed Circuits Assemblers Guide to Solder Defects. Introduction The growth of personal electronic devices continues to
Indium: The key to the next generation of bionic eyes
Solder is ubiquitous in internal medical technologies from pacemakers to cochlear prosthetics – the battery, components, and circuit board are held in place by Indium Corporation’s paste,
Solder in Medical Devices
Every day there are advancements in medical technologies that improve our quality of life, raise our life expectancy, and prevent previously debilitating diseases. The world of healthcare was a very
SMTAi Exhibitors Collaborate to Showcase Products
If you think there is nothing new at SMTAi, you may want to take another look. Live@SMTAiis a NEW event that takes place on the show floor at
Indium Shot – What is it and why use it?
Indium shot is a bulk form of indium metal that is shaped like a small tear drop. This is a good form of material to use any time you’re measuring portions of indium. There is no need to
The Right Solder Alloy for the Right Application – Part 2
In our first post about The Right Solder Alloy for the Right Application, we discussed low-temperature solderalloys in general, including bismuth- and indium-containing alloys. In this post we are
Square with Radius Corners vs. Circular Apertures: SMT Optimization for Success Part 4:
In our continued investigation and quest to improve solder paste printing for fine-feature paste deposits, we also found that consistency (low standard deviation) favored the square apertures when
Indium Spheres
Spheres are the form of indium I use the most for testing solder wetting properties, because they have a precise volume. (As opposed to shot, which does not have as tightly controlled size or
Looking for Safety Data Sheets?
Access everything you need — from technical specifications to application guidance — in one convenient location.
Your Success
is Our Goal
Optimize your processes with the latest materials, technology, and expert application support. It all starts by connecting with our team.