Tin Whiskers Family Qualificatrions - Class 2

ALL INTEGRATED PASSIVE COMPONENTS, ANTENNAS & CHIP INDUCTORS PRODUCED BY JOHANSON TECHNOLOGY INC.

RESULTS:

All Johanson Integrated Passive Components (IPC’s) and Chip Inductors are qualified by similarity based on the test results herein.

Three (3) separate, representative, Johanson Integrated Passive Components (IPC’s) all plated on the same Johanson plating line, completed and meet all requirements of:

  • JEDEC JESD201 Environmental Acceptance Requirements for Tin Whisker Susceptibility of Tin and Tin Alloy Surface Finishes for Class 2 products
  • JEDEC JESD22-A121A Test Method for Measuring Whisker Growth on Tin & Tin Alloy Surface Finishes

All samples exhibited no (zero) tin whisker growth during both specified storage tests, and <= 26 micron tin whisker growth during temperature cycling, therefore meeting the 45 micron specified maximum. This qualifies all Johanson IPC’s, Antennas and Chip Inductors by similarity.

DETAILS: Johanson IPC’s tested:

JTI Part Number Part Description EIA Size Manufacturing Order Number Lot Number Test ID
2450AT18A100 Antenna, 2.45 GHz 1206 354746-01 403-8044 A1
2450BM14E0003 Impedance Matched Balun 0603 454381-01 505-X028 B2
5425BL07B0100 Balun, 5.5GHz 0402 423145-00 416-8029 B1

Nine (9) samples of each part number were tested in each of the three (3) Tin Whisker tests conducted in parallel and described in Figure 1. All three (3) tests were run as specified for Class 2 products, i.e., 1500 temperature cycles, and 4000 hours for each of the storage tests.

Whiskers Tests to perform according to the JEDEC Standards

Whiskers Tests to perform according to the JEDEC Standards
Test definition Temperature Cycling Room temperature/Humidity storage High temperature/humidity storage
Condition -55 +0/-10°C to 85 +10/-0°C or -40 +0/-10°C to 85 +10/-0°C
Soak: 10 mn / 3 cycles/hr
Readout: every 500 cycles

Minimum duration: 1500* cycles

Minimum duration: 1500* cycles for class 2 products
30±2°C 60±3 %RH*

Readout: every 1000hr

Minimum duration: 3000 hr*

Minimum duration: 4000 hr* for class 2 products
60±5°C 87+3/-2 %RH* or 55±3°C 85±3 %RH*

Readout: every 1000hr

Minimum duration: 3000 hr*

Minimum duration: 4000 hr* for class 2 products
Whisker Control and Sampling -Scanning Electron Microscope (SEM) with a magnification X300
-3 sample locations for coupons and 3 visible sides for components sample
-3 Lots per stress with 2 samples with 96 screening inspection and 18 Detailed inspection per read-out for Multi-leaded component
3 Lots per stress with 3 samples with 18 screening inspection and 18 Detailed inspection per read-out for passive and discrete components with 4 leads or fewer
Criteria Equivalent or better to reference part with a Pb or is not:
< 40μm for Room temperatire/Humidity storage and High temperature/humudity storage
< 45μm for Temperature cycling

* Class 2 products are business critical applications such as Telecom Infrastructure equipment, High-end Servers, Automotive, etc., requiring long product lifetimes and minimal downtime.