Influence of wafer grinding and etching techniques on the fracture strength of thin silicon substrates
Research output: Contribution to book/conference proceedings/anthology/report › Conference contribution › Contributed › peer-review
Contributors
Abstract
We investigated the influence of various backside thinning techniques on the fracture strength of thinned single crystalline silicon wafers by means of ring-ball breaking tests and atomic force microscopy (AFM). In the case of wafer grinding the mean breaking force of samples depends on the surface roughness after fine grinding. Subsequently applied stress-relief processes spinetching, CMP polishing and plasma dry etching lead to a strong increase of breaking force by a factor of 6 to 15. The three different stress-relief techniques resulted in the same maximum values of breaking force. However, the required amount of material removal is specifically different and also depends on the conditions of initial grinding step. The results will help to identify optimum wafer thinning sequences in the field of MEMS devices and future applications of ultra-thin and flexible integrated circuits.
Details
Original language | English |
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Title of host publication | Advances in Abrasive Technology XIV |
Pages | 659-665 |
Number of pages | 7 |
Publication status | Published - 2011 |
Peer-reviewed | Yes |
Publication series
Series | Advanced materials research |
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Volume | 325 |
ISSN | 1022-6680 |
Conference
Title | 14th International Symposium on Advances in Abrasive Technology, ISAAT 2011 |
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Duration | 18 - 21 September 2011 |
City | Stuttgart |
Country | Germany |
External IDs
ORCID | /0000-0002-0757-3325/work/142252340 |
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Keywords
ASJC Scopus subject areas
Keywords
- Breaking strength, Stress-relief processes, Thin silicon, Wafer grinding, Wafer thinning