UPDATE: TRADING SCHEDULED TO COMMENCE TOMORROW FOR ChipMOS' SUBSIDIARY ON TAIWAN'S EMERGING STOCK BOARD; COMPANY COMPLETES SALE

  UPDATE: TRADING SCHEDULED TO COMMENCE TOMORROW FOR ChipMOS' SUBSIDIARY ON
TAIWAN'S EMERGING STOCK BOARD; COMPANY COMPLETES SALE OF 0.8% OF SUBSIDIARY'S
                                    SHARES

PR Newswire

HSINCHU, Taiwan, April 18, 2013

HSINCHU, Taiwan, April 18, 2013 /PRNewswire-FirstCall/ --ChipMOS TECHNOLOGIES
(Bermuda) LTD. ("ChipMOS" or the "Company") (Nasdaq: IMOS) today announced
trading of shares of its subsidiary ChipMOS TECHNOLOGIES INC., a Taiwan
corporation ("ChipMOS Taiwan") on Taiwan's emerging stock board of Gre Tai
Securities Market under stock code "8150" is scheduled to commence tomorrow,
Friday, April 19, 2013.

The Company also announced today, its sale of 6.5 million shares or 0.8% of
the total number of ChipMOS Taiwan's outstanding shares, at the price of
NT$15.0 per share to ChipMOS Taiwan's underwriters, Yuanta Securities Company
Limited and Capital Securities Corp., and to certain others, including non-US
employees of ChipMOS Taiwan. After deducting tax expense payable to ROC
authority for the aforementioned sale, the proceeds to ChipMOS Bermuda were
approximately NT$97.2 million (US$3.3 million).As of April 18, 2013, after
taking into account the above mentioned sale by ChipMOS Bermuda, the Company
continues to hold approximately 703 million shares of ChipMOS Taiwan,
representing 83.4% of the total number of ChipMOS Taiwan's outstanding
shares. Siliconware Precision Industries Co., Ltd., the Company's other major
shareholder continues to hold 133 million shares of ChipMOS Taiwan,
representing approximately 15.8% of the total number of ChipMOS Taiwan's
outstanding shares.

The Company and ChipMOS Taiwan will continue to work towards satisfying the
eligibility requirements for listing ChipMOS Taiwan on the Taiwan Stock
Exchange ("TSE") in the second quarter of 2014.The Company expects that its
ownership in ChipMOS Taiwan will be further reduced to 70% or less upon or
prior to the completion of the TSE listing to comply with eligibility
requirements. For risks associated with the continued trading on the emerging
market stock board and the planned TSE listing plan, please refer to the press
releases issued by the Company on March 18, 2013 and April 12, 2013.

About ChipMOS TECHNOLOGIES (Bermuda) LTD.:

ChipMOS (http://www.chipmos.com) is a leading independent provider of
semiconductor testing and assembly services to customers in Taiwan, Japan, and
the U.S. With advanced facilities in Hsinchu and Southern Taiwan Science Parks
in Taiwan and Shanghai, ChipMOS and its subsidiaries provide testing and
assembly services to a broad range of customers, including leading fabless
semiconductor companies, integrated device manufacturers and independent
semiconductor foundries.

Forward-Looking Statements

Certain statements contained in this announcement may be viewed as
"forward-looking statements" within the meaning of Section 27A of the U.S.
Securities Act of 1933, as amended, and Section 21E of the U.S. Securities
Exchange Act of 1934, as amended. Such forward-looking statements involve
known and unknown risks, uncertainties and other factors, which may cause the
actual performance, financial condition or results of operations of the
Company to be materially different from any future performance, financial
condition or results of operations implied by such forward-looking statements.
Further information regarding these risks, uncertainties and other factors is
included in the Company's most recent Annual Report on Form 20-F filed with
the U.S. Securities and Exchange Commission (the "SEC") and in the Company's
other filings with the SEC.

Contacts:
In Taiwan                           In the U.S.

Dr. S.K. Chen                       David Pasquale

ChipMOS TECHNOLOGIES (Bermuda) LTD. Global IR Partners

+886-6-507-7712                     +1-914-337-8801

s.k._chen@chipmos.com               dpasquale@globalirpartners.com

SOURCE ChipMOS TECHNOLOGIES (Bermuda) LTD.

Website: http://www.chipmos.com