Current Rating
Rating FAQ
Long-term  :   twA+
Short-term  :   twA-1
Outlook  :  Stable
Issuer Rating History
Rating Date Long-term Rating outlook (credit watch) Short-term Rating
2022/05/27 twA+ Stable twA-1
2019/05/27 twA Stable twA-1
2018/07/18 twA Negative twA-1
2016/11/22 twA Negative twA-2
2015/06/08 twA+ Negative twA-1
2011/06/21 twA+ Stable twA-1
2010/07/08 twA Positive twA-1
2008/11/25 twA Stable twA-1
2007/06/07 twA Positive twA-1
2007/05/31 twA Positive twA-2
2006/07/03 twA Stable twA-2
2005/05/17 twA- Positive twA-2
2004/12/22 twA- Stable twA-2
2001/03/26 twBBB Stable twA-3
Research Analysis
Publish Date Subject
2025/05/20 Media Release: Unimicron Technology Corp. Ratings Affirmed At 'twA+/twA-1' On Low Debt Leverage; Outlook Stable
2024/05/29 Media Release: Unimicron Technology Corp. Ratings Affirmed At 'twA+/twA-1'; Liquidity Revised To Exceptional From Strong; Outlook Stable
2023/05/23 Research Update: Unimicron Technology Corp. Ratings Affirmed At 'twA+/twA-1'; Outlook Stable
2022/05/27 Media Release: Unimicron Technology Corp. Upgraded To 'twA+' On Robust Profitability; Outlook Stable
2022/02/24 Bulletin: Unimicron's Business Diversity To Improve Slightly Following Subtron Technology Merger
2021/05/27 Research Update: Unimicron Technology Corp. Ratings Affirmed At 'twA/twA-1'; Outlook Stable
Last 5 Years Issue Rating History
Series Amount
(Million)		 Issue Date Maturity Date
 Coupon Rate
(%)		 Rating Rating Date
None
*Taiwan Ratings maintains continuous surveillance over its ratings and the “Rating date” below refers to the last date on which the ratings/outlook have been changed or the ratings on/off CreditWatch.
*Unless there is a material change in our rating views on a given entity, Taiwan Ratings does not update the “Rating date,” which is accordance with the general international practice for rating disclosures.