- Internal mask facility at ERSO/ITRI 1975
- Spinned-off as Taiwan Mask Corporation From ERSO/ITRI 1988
- Building(Fab I) opened 1990
- IPO 1995
- OPC & PSM technology capability 1997
- Building(Fab II) opened 1999
- ISO 9002:1994 Certification approved by RW-TUV 2000
- Merged Innova, Inc. as TMC-Fab III 2000
- ISO 9001:2000 Certification approved by RW-TUV 2003
- QS9000:1998 Certification approved by RW-TUV 2004
- ISO 9001:2008 Certification approved by RW-TUV 2015
- ISO 14001:2004 Certification approved by RW-TUV 2016
- Merged Miracle Technology, Inc. 2017
- ISO 9001:2015 Certification approved by RW-TUV 2018
- ISO 14001:2015 Certification approved by RW-TUV 2018