# JS-002 (Annex C) - Procedure for determining Csmall and not to test devices smaller than 4mm X 4mm?

**URL:** https://forum.esda.org/t/js-002-annex-c-procedure-for-determining-csmall-and-not-to-test-devices-smaller-than-4mm-x-4mm/184
**Category:** Uncategorized
**Created:** [September 6, 2021, 11:11am UTC](https://forum.esda.org/t/js-002-annex-c-procedure-for-determining-csmall-and-not-to-test-devices-smaller-than-4mm-x-4mm/184 "2021-09-06T11:11:41Z")
**Posts on this page:** 1
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### Author: ![Bruce](https://forum.esda.org/letter_avatar_proxy/v4/letter/b/ccd318/32.png) [@Bruce](https://forum.esda.org/u/Bruce)
#### Post date: [September 6, 2021, 11:11am UTC](https://forum.esda.org/t/js-002-annex-c-procedure-for-determining-csmall-and-not-to-test-devices-smaller-than-4mm-x-4mm/184/1 "2021-09-06T11:11:41Z")

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Dear all,

I noticed that JS-002 (Annex C)describe ICDS (Integrated circuits and discrete semiconductors) Csmall and I have no idea why standard mention about this information. Could you please help explain this topic to me ? Also, why the procedure ask us beware of package size and vacuum hole?

JS-002 recommending not to test devices smaller than 4mm X 4mm?

Bruce