Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/81714
Title: Removal of plasma-etch-induced polymers from submicron via holes by excimer laser ablation
Authors: Lu, Y.F. 
Lee, Y.P.
Zhou, M.S. 
Issue Date: 1998
Source: Lu, Y.F.,Lee, Y.P.,Zhou, M.S. (1998). Removal of plasma-etch-induced polymers from submicron via holes by excimer laser ablation. Materials Research Society Symposium - Proceedings 526 : 415-420. ScholarBank@NUS Repository.
Abstract: A relatively new approach in removing the sidewall and bottom polymers resulting from reactive ion etching of via holes, using a non-contact dry excimer laser cleaning technique has been investigated. Pulsed excimer laser ablation at 248 nm has been found to be capable of removing the via-etch-induced polymers at fluences limited by the damage threshold of the underlying Al-Cu metal film with TiN anti-reflective coating of 250-280 mJ cm-2. A fluence window of 150-200 mJ cm-2 for efficient laser cleaning is also determined from the ablation rate data using the relation in the limit of Beer's law absorption. Experimental results have also shown that the ablation rate when irradiating at an angle is not only comparable to that at vertical incidence, but even register higher values for most of the ablation rate data obtained. An optimum incident angle for laser cleaning of 45° can be determined from the results.
Source Title: Materials Research Society Symposium - Proceedings
URI: http://scholarbank.nus.edu.sg/handle/10635/81714
ISSN: 02729172
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

Page view(s)

20
checked on Feb 16, 2018

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.