EXHIBIT 5.1

                               KIRKLAND & ELLIS
               PARTNERSHIPS INCLUDING PROFESSIONAL CORPORATIONS
                              777 South Figueroa
                         Los Angeles, California 90017
                Telephone: 213-680-8400 Facsimile: 213-680-8500

                               January 10, 2002

ChipPAC, Inc.
47400 Kato Road
Fremont, California 94538

   Re:  ChipPAC, Inc.
        Registration Statement on Form S-3

Ladies and Gentlemen:

   We are issuing this opinion letter in our capacity as special legal counsel
to ChipPAC, Inc., a Delaware corporation (the "Company"), in connection with
the proposed registration by the Company of up to 9,200,000 shares of the
Company's Class A common stock, par value $0.01 per share (the "Common Stock"),
including 1,200,000 of shares of Common Stock to cover over-allotments, if any,
pursuant to a Registration Statement on Form S-3 filed with the Securities and
Exchange Commission (the "Commission") on January 2, 2002, under the Securities
Act of 1933, as amended (the "Act") (such Registration Statement, as amended or
supplemented, is hereinafter referred to as the "Registration Statement"). The
Common Stock is to be sold pursuant to an underwriting agreement among the
Company, Credit Suisse First Boston Corporation, Merrill Lynch, Pierce, Fenner
& Smith Incorporated and Thomas Weisel Partners LLC, as representatives for the
several underwriters named therein (the "Underwriting Agreement").

   In that connection, we have examined originals, or copies certified or
otherwise identified to our satisfaction, of the Registration Statement and
such documents, corporate records and other instruments as we have deemed
necessary to enable us to render this opinion.

   For purposes of this opinion, we have assumed the authenticity of all
documents submitted to us as originals, the conformity to the originals of all
documents submitted to us as copies and the authenticity of the originals of
all documents submitted to us as copies. We have also assumed the genuineness
of the signatures of persons signing all documents in connection with which
this opinion is rendered, the authority of such persons signing on behalf of
the parties thereto other than the Company and the due authorization, execution
and delivery of all documents, including the Common Stock, by any applicable
parties thereto other than the Company. As to any facts material to the
opinions expressed herein which we have not independently established or
verified, we have relied upon statements and representations of officers and
other representatives of the Company and others.

   Based upon and subject to the assumptions, qualifications, exclusions and
other limitations contained in this letter, we are of the opinion that the
Common Stock has been duly authorized and, when (i) the Registration Statement
becomes effective under the Act, (ii) the Board of Directors of the Company has
taken all necessary action to approve the issuance and sale of the Common
Stock, (iii) the Common Stock has been duly executed and delivered on behalf of
the Company countersigned by the Company's transfer agent/registrar and (iv)
the Common Stock is issued in accordance with the terms of the Underwriting
Agreement upon receipt of the consideration to be paid therefor, the Common
Stock will be validly issued, fully paid and nonassessable.

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   We hereby consent to the filing of this opinion with the Commission as
Exhibit 5.1 to the Registration Statement. We also consent to the reference to
our firm under the heading "Legal Matters" in the Registration Statement. In
giving this consent, we do not thereby admit that we are in the category of
persons whose consent is required under Section 7 of the Act or the rules and
regulations of the Commission.

   This opinion is limited to the specific issues addressed herein, and no
opinion may be inferred or implied beyond that expressly stated herein. We
assume no obligation to revise or supplement this opinion should the present
laws of the States of New York or California or the General Corporation Law of
the State of Delaware or the federal law of the United States be changed by
legislative action, judicial decision or otherwise.

   This opinion is furnished to you pursuant to the applicable rules and
regulations promulgated under the Act in connection with the filing of the
Registration Statement.

                                          Sincerely,

                                          /s/ KIRKLAND & ELLIS

                                          Kirkland & Ellis

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