POWER OF ATTORNEY

The undersigned hereby constitutes and appoints
John Kibarian, Kimon Michaels  and Gregory Walker,
and each of them, his or her, true and lawful attorney-in-fact to:

(1)	prepare, execute in the undersigned's name and
on the undersigned's behalf, and submit to the U.S. Securities
and Exchange Commission (the "SEC") a Form ID, including
amendments thereto, and any other documents necessary or
appropriate to obtain codes and passwords enabling the
undersigned to make electronic filings with the SEC of
reports required by Section 16(a) of the Securities
Exchange Act of 1934 or any rule or regulation of the SEC;

(2)	execute for and on behalf of the undersigned,
in the undersigned's capacity as an officer
and/or director, and/or person who holds more
than 10% of the stock of PDF Solutions, Inc. (the "Company"),
Forms 3, 4 and 5 in accordance with Section 16(a) of the
Securities Exchange Act of 1934, as amended (the "Exchange Act")
and the rules thereunder;

(3)	do and perform any and all acts for and on behalf
of the undersigned which may be necessary or desirable to
complete and execute any such Form 3, 4 or 5, complete
and execute any amendment(s) thereto, and timely file
 any such form with the United States Securities and
 Exchange Commission and any stock exchange or
similar authority; and

(4)	take any other action of any type whatsoever
in connection with the foregoing which,
in the opinion of such attorney-in-fact,
may be of benefit to, in the best interest of, or legally
required by, the undersigned, it being understood that
the documents executed by such attorney-in-fact on behalf
of the undersigned pursuant to this Power of Attorney shall
be in such form and shall contain such terms and conditions
as such attorney-in-fact may approve in such
attorney-in-fact's discretion.

	The undersigned hereby grants to each
such attorney-in-fact full power and authority
to do and perform any and every act and thing
whatsoever requisite, necessary or proper to be
done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as
the undersigned might or could do if personally present,
with full power of substitution or revocation, hereby
ratifying and confirming all that such attorney-in-fact,
or such attorney-in-fact's substitute or substitutes,
shall lawfully do or cause to be done pursuant to this
power of attorney.  The undersigned acknowledges that the
foregoing attorneys-in-fact, in serving in such capacity
at the request of the undersigned, are not assuming, nor
is the Company assuming, any of the undersigned's responsibilities
to comply with Section 16 of the Exchange Act.

	This Power of Attorney shall remain in full
force and effect until the undersigned is no
longer required to file Forms 3, 4, and 5 with
 respect to the undersigned's holdings of and
transactions in securities issued by the Company,
 unless earlier revoked or modified by the undersigned
in a signed writing, but shall terminate automatically
as to each individual attorney-in-fact when such person is
no longer an employee of the Company.  This Power of Attorney
may be filed with the SEC as a confirming statement of the
authority granted herein.


	The undersigned has caused this Power of
 Attorney to be executed as of this 26th day
of February, 2014.


/s/KwangHyun Kim
Kwang-Hyun (KH) Kim