Solder Sphere Diameter and Spheroid Tolerance

In the article “How is a high quality solder sphere made?”, we highlighted that one of the characteristics of high quality solder spheres are that they have uniform diameters and tight diameter tolerances and tight spheroid tolerances. In this article, we will explain why it is important to have such a tight solder ball diameter and spheroid tolerance.

Solder Ball Diameter & Spheroid Tolerance

The smaller the solder spheres, the more important it is to get the tolerance of both the diameter and sphericity (measure of how round or spherical the ball is) under control.

Solder Sphere Selector Guide
Diameter Diameter Tolerance Spheroid Tolerance Remarks
Top of Page
How to Manufacture Quality Solder Spheres
Control and Measure Solder Ball Diameter and Spheroid Tolerance
0.075mm – 0.15mm
(3-6 mil)
±0.005 mm
(±0.2 mil)
1.5% Truly Tight Tolerances: We take one lot of solder spheres and divides it into 4 smaller lots. Each lot is then checked with advanced visual inspection systems. If even 1 ball is out of spec, the entire batch is scrapped and reworked!
0.20mm – 0.6mm
(8-24 mil)
±0.010 mm
(±0.4 mil)
0.65mm – 0.76mm
(25-30 mil)
±0.015 mm
(±0.6 mil)

CAPLINQ supplies a range of solder spheres including Tin/Lead (Sn63Pb37) Solder Spheres or our Leadfree (Pb-free) Solder Spheres including SAC105, SAC125N, SAC305, SAC387, SAC396 or SAC405 and 4N Pure Tin Sn100 Solder Spheres.

We also now offer Bi58Sn42 Eutectic Leadfree Solder Spheres and Bi57Sn42Ag1 Near-Eutectic Leadfree Solder Spheres. You can also contact us if you have further questions on buying solder balls.

About Chris Perabo

Chris is an energetic and enthusiastic engineer and entrepreneur. He is always interested in taking highly technical subjects and distilling these to their essence so that even the layman can understand. He loves to get into the technical details of an issue and then understand how it can be useful for specific customers and applications. Chris is currently the Director of Business Development at CAPLINQ.

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