<SEC-DOCUMENT>0001292814-21-000923-index.html : 20210315
<SEC-HEADER>0001292814-21-000923.hdr.sgml : 20210315
<ACCEPTANCE-DATETIME>20210315070451
ACCESSION NUMBER:		0001292814-21-000923
CONFORMED SUBMISSION TYPE:	6-K
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20201231
FILED AS OF DATE:		20210315
DATE AS OF CHANGE:		20210315

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			UNITED MICROELECTRONICS CORP
		CENTRAL INDEX KEY:			0001033767
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			F5
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		6-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-15128
		FILM NUMBER:		21739776

	BUSINESS ADDRESS:	
		STREET 1:		8F, NO.68, SEC. 1, NEIHU RD.,
		CITY:			TAIPEI
		STATE:			F5
		ZIP:			11493
		BUSINESS PHONE:		886-2-2658-9168

	MAIL ADDRESS:	
		STREET 1:		8F, NO.68, SEC. 1, NEIHU RD.,
		CITY:			TAIPEI
		STATE:			F5
		ZIP:			11493
</SEC-HEADER>
<DOCUMENT>
<TYPE>6-K
<SEQUENCE>1
<FILENAME>umcfs4q20_6k.htm
<DESCRIPTION>FORM 6-K
<TEXT>
Document 1 - file: umcfs4q20_6k.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>ex99-1.htm
<DESCRIPTION>EX-99.1
<TEXT>
Document 2 - file: ex99-1.htm

</DOCUMENT>
</SEC-DOCUMENT>