Document:

Separation Agreement and General Release

 Exhibit 10.52 
 Separation Agreement and General Release 
 Mr. Sean Hunkler and MEMC Electronic Materials, Inc. 

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 SEPARATION AGREEMENT 
 AND GENERAL RELEASE 
 This Separation Agreement and General Release
(“Agreement”) is made and entered into by and between Sean Hunkler (“Mr. Hunkler”) and MEMC Electronic Materials, Inc. (“MEMC”). In consideration of the following promises, the parties agree as
follows: 
 1. Termination of Employment/Notice Period 
 (a) As of July 22, 2008, Mr. Hunkler was relieved of the day-to-day activities of his position as Senior Vice President, Manufacturing, although
he remained employed by MEMC. Mr. Hunkler’s employment with MEMC will be terminated effective as of September 5, 2008 (the “Termination Date”). As of the Termination Date, Mr. Hunkler’s employment
relationship with MEMC will end. Except as provided herein, Mr. Hunkler will receive no other wages, payments, or benefits of any kind after the Termination Date. 
 (b) Mr. Hunkler agrees that between July 22, 2008 and September 5, 2008 (the “Notice Period”), he will, without further compensation other than as set forth in this Agreement, be
available to assist MEMC as reasonably requested by MEMC at mutually agreeable time(s) and places(s) regarding activities pertaining to his prior responsibilities with MEMC and do such other things as are reasonably requested by MEMC to provide for
an orderly transition of his employment responsibilities. In addition, from July 22, 2008 until September 5, 2009, Mr. Hunkler agrees to assist MEMC, and if necessary to testify through a deposition or at trial, with respect to
matters related to periods during which he was employed by MEMC. MEMC will reimburse Mr. Hunkler for reasonable and necessary out-of- pocket business expenses incurred by him in connection with the services provided under this
Paragraph 1(b), including (i) business travel expenses when travel is required and pre-approved by MEMC and (ii) other items agreed to by MEMC in advance of being incurred. Such services shall be provided by Mr. Hunkler in his
capacity as an employee of MEMC (or former employee of MEMC) and shall be at such times and of such scope as are reasonably requested by the Senior Vice President of Human Resources of MEMC. These services will not exceed five hours (5) hours
per week. This covenant from Mr. Hunkler is a material part of this Agreement, and without this covenant, MEMC would not enter into this Agreement. The obligations of Mr. Hunkler to provide assistance under this Paragraph 1(b) shall
terminate in the event of Mr. Hunkler’s death or incapacity. 

 Separation Agreement and General Release 
 Mr. Sean Hunkler and MEMC Electronic Materials, Inc. 
  
  
  

 2. Acknowledgements. 
 (a) Mr. Hunkler affirms that he has reported all hours worked as of the date he signs this Agreement (the “Date of Agreement”) and
has received all compensation, wages, bonuses, commissions and benefits to which he is entitled, except that any unused paid time off (PTO) Mr. Hunkler has remaining as of the Termination Date, and which has not been paid as of the Termination
Date, shall be paid in a lump sum at the next normal salaried payroll cycle date, subject to all withholdings and deductions currently applicable to compensation received by an employee of MEMC. 
 (b) Before the Termination Date, Mr. Hunkler may have been a participant in incentive or bonus plan(s) of MEMC, including but not limited to any
2008 Quarterly Incentive Plan(s), and/or any 2008 executive bonus or incentive plan(s) adopted by MEMC. As part of this Agreement, both parties agree and acknowledge that Mr. Hunkler is not entitled to any bonus payments, earned or unearned,
accrued or unaccrued, for any portion of 2008. 
 (c) Both parties agree and acknowledge that Mr. Hunkler is not entitled to any
payments, earned or unearned, accrued or unaccrued, under any employment agreement or other agreement with MEMC to which Mr. Hunkler is a party, including the employment agreement between Mr. Hunkler and MEMC, effective August 15,
2005, a copy of which is attached hereto as Exhibit 1 (the “Employment Agreement”), except that Mr. Hunkler will be paid the thirty (30) day notice period referenced in the Employment Agreement, which shall be paid
pursuant to MEMC’s normal payroll cycles, subject to all withholdings and deductions currently applicable to compensation received by an employee of MEMC, as described below in Paragraph 3(a). 
 (d) Both parties agree and acknowledge that pursuant to certain equity incentive plans or other stock option agreements of MEMC, MEMC has granted
Mr. Hunkler options to purchase shares of common stock of MEMC. Except pursuant to Paragraph 3 herein, any stock options granted to Mr. Hunkler that are not vested as of the Termination Date shall be forfeited. Any stock options granted to
Mr. Hunkler that are vested as of the Termination Date shall remain exercisable for 90 days after the Termination Date in accordance with the terms of such options. Such stock options shall also be subject to all other terms of the applicable
stock option agreements. Mr. Hunkler understands and agrees that he has no right or entitlement to any other shares or options pursuant to any other agreement with the Company. 
 (e) Mr. Hunkler affirms that he has been granted any leaves to which he was entitled under the Family and Medical Leave Act, or related state or
local leave or disability accommodation laws. 
 (f) Mr. Hunkler affirms that he has no known workplace injuries or occupational
diseases. 
 (g) Mr. Hunkler affirms that he has not divulged any MEMC proprietary or confidential information, and will continue to
maintain the confidentiality of such information pursuant to his Employment Agreement. 

 Separation Agreement and General Release 
 Mr. Sean Hunkler and MEMC Electronic Materials, Inc. 
  
  
  

 (h) Mr. Hunkler further affirms that he has not been or is not being retaliated against for
reporting any allegations of wrongdoing by MEMC or its officers, including any allegations of corporate fraud. 
 3. Severance
Consideration. In connection with Mr. Hunkler’s termination, MEMC and Mr. Hunkler have agreed to settle all matters relating to Mr. Hunkler’s employment relationship with MEMC and the termination of such
relationship. In exchange for Mr. Hunkler’s promises and obligations herein, the parties agree as follows: 
 (a) Notice
Period. Pursuant to the terms of this Agreement, Mr. Hunkler will be paid for the thirty (30) day paid notice period set forth in his Employment Agreement referenced above in Paragraph 2(c), with this thirty (30) days of paid
notice commencing August 6, 2008 and ending September 5, 2008, subject to all withholdings and deductions currently applicable to compensation received by an employee of MEMC, but without any 401(k) contributions being deducted. During the
Notice Period, Mr. Hunkler will not continue to receive or accrue any additional PTO, such as vacation days and holidays. 
 (b)
Stock Option Program; Acceleration of Options; Acceleration of RSUs. So long as Mr. Hunkler continues to adhere to the promises and agreements set out in this Agreement, from the date hereof and up to and including the Termination
Date, Mr. Hunkler will continue to vest in the stock options granted to him under the MEMC 2001 Equity Incentive Plan (the “2001 Plan”) through the Termination Date, resulting in the vesting of (i) 50,000 options on
August 15, 2008; (ii) 3,450 options on July 25, 2008; and (iii) 5,000 options on July 24, 2008. In addition, MEMC has agreed, and the MEMC Compensation Committee shall take all necessary steps to approve, (i) the
acceleration of vesting of 75,000 options from Mr. Hunkler’s August 15, 2005 option grant that would have otherwise vested on August 15, 2009, such that these 75,000 options shall vest (after such acceleration) on
September 4, 2008 and (ii) the acceleration of vesting of a total of 5,000 Stock Unit Awards (RSUs) from Mr. Hunkler’s January 24, 2007 RSU grants that would otherwise have vested on January 24, 2009, such that these
5,000 RSUs shall vest (after such acceleration) on September 4, 2008; provided, however, that the payment of these 5,000 RSUs shall not be made until the earliest of January 24, 2009. Pursuant to this Agreement, any stock options or
RSUS granted to Mr. Hunkler under the 2001 Plan that are not vested as of the end of the Termination Date shall be forfeited. Any stock options granted to Mr. Hunkler that are vested as of the Termination Date shall remain exercisable for
90 days after the Termination Date in accordance with the terms of such options. Such stock options shall also be subject to all other terms of the applicable stock option agreements and the 2001 Plan. 
 (c) Benefits. Except as otherwise set forth herein, during the Notice Period, Mr. Hunkler shall have continued eligibility for all
U.S. benefit programs (as those plans may exist from time to time) through the Notice Period, provided that Mr. Hunkler contributes the same amount for such benefit coverage as similarly situated employees and provided further that MEMC
continues to provide such coverage for active non-union employees. 

 Separation Agreement and General Release 
 Mr. Sean Hunkler and MEMC Electronic Materials, Inc. 
  
  
  

 (d) Severance Payments. Mr. Hunkler will be paid a total severance amount pursuant
to this Agreement equal to 12 months salary of $394,000 (the “Severance Amount”). Such Severance Amount will be paid in twelve equal month installments of $32,833.33 on the first Company pay date occurring in each month, commencing
with September 2008, and will be subject to all withholding and deductions currently applicable to compensation received by an employee of MEMC. For clarity, these monthly installments will be paid on the following dates: September 12,
2008; October 10, 2008; November 7, 2008; December 5, 2008; January 2, 2009; February 13, 2009; March 13, 2009; April 10, 2009; May 8, 2009; June 5,
2009; July 3, 2009; and August 14, 2009. 
 (e) Lump Sum COBRA Amount. In addition to the Severance Amount, on
September 5, 2008, MEMC will pay Mr. Hunkler a lump sum amount equal to the amount of his COBRA payments for twelve months (the “Lump Sum COBRA Amount”). 
 (f) Cell Phone Number. Pursuant to this Agreement, Mr. Hunkler shall be permitted to keep his cell phone number (XXX-XXX-XXXX),
although he will be required to turn in to MEMC his Blackberry and all email and contacts and addresses included therein, without maintaining a copy thereof, pursuant to Paragraph 9 below. 
 The payments and benefits provided herein are made in lieu of any and all payments or benefits that might otherwise be available to Mr. Hunkler
arising out of his employment with MEMC, excluding Mr. Hunkler’s non-forfeitable rights to his accrued benefits (within the meaning of Sections 203 and 204 of ERISA), if any, under the MEMC Pension Plan and the MEMC Retirement Savings
Plan, as such plans may be hereafter amended, and Mr. Hunkler’s right, if any, to continued COBRA coverage. Mr. Hunkler acknowledges and agrees that the payments and benefits provided herein are in full settlement of his employment
relationship, Employment Agreement, and termination from employment with MEMC. 
 4. Mr. Hunkler’s Agreement Not to File
Suit. In consideration of the payments and benefits set out in Paragraph 3 above, Mr. Hunkler agrees for himself and on behalf of, as applicable, his heirs, beneficiaries, executors, administrators, successors,
assigns, and anyone claiming through or under any of the foregoing (collectively “Releasers”), that he will not file or otherwise submit any, claim, complaint or action to any court, or any other forum, (nor will he permit any person,
group of persons, or organization to take such action on his behalf except as otherwise provided by law) against MEMC, nor file or otherwise submit any such claim, complaint or action against any subsidiary, affiliate or parent company of MEMC, or
against any officer, agent, employee, successor or assign of MEMC (or of any such subsidiary, affiliate or parent company of MEMC) (collectively “Releasees”), arising out of any action or non-action on the part of MEMC or on the part of
any such above-referenced entity or any officer, agent or employee of MEMC or of any such entity for any act or event that occurred on or prior to the Date of Agreement. Said claims, complaints and actions include, but are not limited to
(a) any breach of an actual or implied contract of employment between Mr. Hunkler and MEMC, (b) any claim of unjust, wrongful, or tortious discharge (including any claim of fraud, negligence, whistle blowing, or intentional infliction
of emotional distress), (c) any claim of defamation or other common-law action, (d) any claim of violations arising under the Civil Rights Act of 1964, 

 Separation Agreement and General Release 
 Mr. Sean Hunkler and MEMC Electronic Materials, Inc. 
  
  
  

 
as amended, 42 U.S.C. §§ 2000e, et seq., 42 U.S.C. § 1981, the Age Discrimination in Employment Act, 29 U.S.C. §§ 621, et
seq., the Americans with Disabilities Act, 42 U.S.C. §§ 12101, et seq., the Fair Labor Standards Act of 1938, as amended, 29 U.S.C. §§ 201, et seq., the Rehabilitation Act of 1973, as amended, 29 U.S.C.
§§ 701, et seq., the Employee Retirement Income Security Act ("ERISA"), 29 U.S.C. §§ 1001, et seq., the Worker Adjustment and Retraining Notification Act ("WARN"), 29 U.S.C. §§ 2101, et seq., the
Older Worker Benefit Protection Act ("OWBPA") 29 U.S.C. §§ 621, et seq., and (e) all other claims arising under any other federal, state, or local law regulation or ordinance. Notwithstanding the foregoing, nothing in this
Agreement prevents Mr. Hunkler from filing a charge with the Equal Employment Opportunity Commission (the “EEOC”) or participating in any investigation or proceeding conducted by the EEOC; however, Mr. Hunkler understands and
agrees that he is waiving any right to receive any monetary relief or other personal relief as a result of such EEOC proceeding or any subsequent legal action brought by him, the EEOC, or any other party. 
 5. Mr. Hunkler's Release of Claims. In consideration of the payments and benefits set out in Paragraph 3 above, Mr. Hunkler
agrees for himself and all Releasors, to release and forever discharge MEMC and all Releasees from any and all matters, claims, demands, damages, causes of action, debts, liabilities, controversies, judgments and suits of every kind and nature
whatsoever, foreseen, unforeseen, known or unknown, including claims, complaints and actions described in Paragraph 4, which have arisen or could arise between Mr. Hunkler and/or Releasors, on the one hand, and MEMC and/or Releasees, on the
other hand, from matters which occurred on or prior to the Date of Agreement, which matters include, but are not limited to, Mr. Hunkler’s employment with MEMC and his termination of employment from MEMC. Mr. Hunkler agrees that he
has not assigned to any third party any matter, claim, demand, damage, debt, cause of action, liability, controversy, judgment, and suit released or waived hereunder. Furthermore, Mr. Hunkler will not accept any proceeds from any suit, claim or
action, which any third party may bring on his behalf. 
 6. Obligations under Employment Agreement/Additional Noncompete.

 (a) Mr. Hunkler agrees that he has continuing obligations to MEMC pursuant to the Employment Agreement and this Agreement. In addition
to the continuing obligations to MEMC included in the Employment Agreement, including but not limited to the noncompete obligation in that Employment Agreement (which lasts two years) and the confidentiality obligation regarding Confidential
Information (as defined in the Employment Agreement) in that Employment Agreement (which lasts forever), which obligations shall continue in full force and effect, whether this Agreement becomes effective or not, Mr. Hunkler and MEMC have
agreed to an additional noncompete obligation and nonsolicit obligation as set forth below. Mr. Hunkler agrees that these obligations and covenants are a material part of this Agreement, and without these covenants, MEMC would not enter into
this Agreement. In consideration of the payments to be made to Mr. Hunkler under this Agreement, Mr. Hunkler agrees that he shall not, directly or indirectly, for a period of five (5) years from the effective date of this Agreement,
(i) engage in any Restricted Competitive Work (as defined below) anywhere in the world including (A) working for, whether as an employee or consultant, owning any interest in, managing, operating, controlling or participating in any person
or entity which engages in, owns or operates 

 Separation Agreement and General Release 
 Mr. Sean Hunkler and MEMC Electronic Materials, Inc. 
  
  
  

 
a business that does Restricted Competitive Work, (B) soliciting any customer or prospective customer of MEMC anywhere in the world to purchase any
products or services which compete with those products or services provided by MEMC and (C) assisting any person or entity in any way to do, or attempt to do, anything prohibited above; or (ii) induce or attempt to induce an employee of
MEMC or any of its affiliates to accept employment or affiliation with another firm or corporation. For the purposes of this Agreement, “Restricted Competitive Work” shall mean and include (i) the development, manufacture,
marketing or sale of multicrystalline wafers or monocrystalline wafers for use in semiconductor applications or solar applications; (ii) the development, manufacture, marketing or sale of polysilicon (of any type or form) for end use in
semiconductor applications or solar applications; or (iii) the development, manufacture, marketing or sale of silane, FSA or STF. 
 (b)
Any violation of the obligations of Mr. Hunkler in this Agreement, including but not limited to Section 6(a) above, or the Employment Agreement by Mr. Hunkler will constitute a material breach of this Agreement and shall subject
Mr. Hunkler to immediate forfeiture and/or repayment of all benefits received or payments made pursuant to this Agreement. In the event of such material breach, MEMC shall send Mr. Hunkler an affidavit of an executive officer of MEMC
setting forth the facts of which MEMC is then aware that constitute such material breach, and demanding immediate repayment of all benefits received by Mr. Hunkler or payments made to Mr. Hunkler pursuant to this Agreement, and
Mr. Hunkler shall be required to (x) demonstrate non-breach of the Agreement, acceptable to MEMC, within five (5) business days of receipt of such affidavit or (y) repay such benefits or payments within five (5) business
days of receipt of such affidavit. MEMC expressly reserves the right to pursue all other legal and equitable remedies available to MEMC by virtue of any breach of the Employment Agreement or any promise made in this Agreement (including Paragraph 10
below), including the right to pursue other legal and equitable remedies in addition to the repayment of the benefits or payments described above. 
 7. Mutual Non-disparagement. Mr. Hunkler represents that he will not, in any way, disparage MEMC or any subsidiary, affiliate or parent of MEMC, or any officer, agent, employee, customer, successor assign of any of them,
or make or solicit any comments, statements or the like to the media or to others that may be considered to be derogatory or detrimental to the good name or business reputation of any of the aforementioned persons or entities. MEMC represents that
MEMC, its officers and directors will not, in any way, disparage Mr. Hunkler or make or solicit any comments, statements or the like to the media or to others that may be considered to be derogatory or detrimental to the good name or business
reputation of Mr. Hunkler. 
 8. No Admission of Wrongdoing. The parties agree that nothing in this Agreement is an
admission of any wrongdoing by either party. 
 9. Return of MEMC Property. Mr. Hunkler agrees to return to MEMC all
property in his possession that belongs to MEMC. 

 Separation Agreement and General Release 
 Mr. Sean Hunkler and MEMC Electronic Materials, Inc. 
  
  
  

 10. CONFIDENTIALITY OF AGREEMENT. MR. HUNKLER AGREES TO KEEP
THE TERMS OF THIS AGREEMENT CONFIDENTIAL EXCEPT AS HE MIGHT BE LAWFULLY COMPELLED TO GIVE TESTIMONY BY A COURT OF COMPETENT JURISDICTION OR AS HE MAY BE REQUIRED BY LAW, REGULATION, GOVERNMENTAL AUTHORITY OR SIMILAR BODY TO DISCLOSE. THIS MEANS THAT
EXCEPT AS STATED ABOVE, HE WILL NOT, AT ANY TIME, TALK ABOUT, WRITE ABOUT OR OTHERWISE PUBLICIZE THIS AGREEMENT, OR ITS NEGOTIATION, EXECUTION OR IMPLEMENTATION, EXCEPT (A) WITH AN ATTORNEY WHO MAY BE ADVISING HIM IN CONNECTION WITH THIS
AGREEMENT; (B) WITH A FINANCIAL CONSULTANT OR EXECUTIVE OUTPLACEMENT COUNSELOR; (C) WITH HIS SPOUSE OR PARENTS; (D) WITH ANY TAXING AUTHORITIES; (E) AS NECESSARY TO ENFORCE THIS AGREEMENT; OR (F) WITH RESPECT TO THE FACTUAL
INFORMATION CONTAINED IN PARAGRAPH 1 AND 2 HEREOF AND THE CONTINUING OBLIGATIONS OF MR. HUNKLER UNDER THE EMPLOYMENT AGREEMENT, PROVIDED THAT SAID PERSONS TO WHOM DISCLOSURE IS PERMITTED PURSUANT TO (A), (B) AND (C) OF THIS PARAGRAPH 10
PROMISE TO KEEP THE INFORMATION THAT MAY BE REVEALED TO THEM CONFIDENTIAL AND NOT TO DISCLOSE IT TO OTHERS.  
 11.
Arbitration. Except for the enforcement of any rights to equitable relief pursuant to Paragraph 6, Mr. Hunkler and MEMC agree that any dispute, controversy or claim (between Mr. Hunkler and MEMC) arising out of, based upon or
relating to this Agreement or its breach, whether denominated as torts or contract claims or as statutory or regulatory claims (including claims for discrimination or discharge based upon race, sex, age, religion, disability or other prohibited
grounds), whether arising before, during or after termination of Mr. Hunkler’s employment, and also including any dispute about whether any particular controversy is arbitrable under the terms of this Paragraph, shall be resolved by
binding arbitration before one (1) arbitrator. Procedurally, but not substantively, the arbitration will be governed by the then current Rules for Resolution of Employment Disputes of the American Arbitration Association (i.e., only the
procedural arbitration rules will be used in any such arbitration, but not the substantive arbitration rules). Any arbitration herein would be held in St. Louis County, Missouri. Judgment on an arbitration award rendered by the Arbitrator may be
entered in any court having jurisdiction thereof. Subject to Paragraph 15 hereof, the Arbitrator shall have the authority to award costs of the Arbitration (including attorney’s fees) in a manner consistent with the controlling substantive law
of the claim at issue. Similarly, subject to Paragraph 15 hereof, the Arbitrator shall have the authority to award damages (or other relief) consistent with the substantive law of the claim being asserted. 
 12. KNOWING AND VOLUNTARY AGREEMENT. MR. HUNKLER HEREBY REPRESENTS, DECLARES AND AGREES THAT HE VOLUNTARILY ACCEPTS THE
PROVISIONS OF THIS AGREEMENT FOR THE PURPOSE OF MAKING A FULL AND FINAL COMPROMISE AND SETTLEMENT OF ALL MATTERS RELATING TO MR. HUNKLER’S EMPLOYMENT RELATIONSHIP WITH MEMC AND ITS TERMINATION. MR. HUNKLER IS ADVISED TO CONSULT AN ATTORNEY. MR.
HUNKLER UNDERSTANDS THE EFFECT OF SIGNING THIS AGREEMENT. 

 Separation Agreement and General Release 
 Mr. Sean Hunkler and MEMC Electronic Materials, Inc. 
  
  
  

 13. Entire Agreement. This Agreement, when signed, including any Exhibits, contains the
entire agreement between the parties and, except as specifically referenced herein, there are no other understandings or agreements, written or oral, between them on the subject except as expressly stated herein. This Agreement, except as
specifically referenced herein, fully supersedes and amends any and all prior agreements or understandings, if any, between Mr. Hunkler and MEMC on any matter that is addressed in this Agreement. This Agreement cannot be amended or modified
except by a written document signed by both an executive officer of MEMC and Mr. Hunkler. Separate copies of this document shall constitute original documents which may be signed separately, but which together will constitute one single
agreement. 
 14. Governing Law, Invalidity of Provisions. This Agreement shall be construed and governed by the substantive
laws of the State of Missouri (except its laws and decisions regarding conflicts of law, which shall be disregarded in their entirety). If any part or provision of this Agreement is determined to be invalid or unenforceable under applicable law, the
validity or enforceability of the remaining provisions shall be unaffected. To the extent that any provision of this Agreement is adjudicated to be invalid or unenforceable because it is overbroad, that provision shall not be void, but rather shall
be limited only to the extent required by applicable law and enforced as so limited. 
 15. Consequences of Violation of this
Agreement. If it is finally determined by a court or arbitrator that a party has violated any of its promises contained in this Agreement, then such party shall reimburse the other party for all reasonable costs incurred by the other party,
including reasonable attorneys’ fees, in enforcing or defending its rights under this Agreement. If a court or arbitrator does not specifically find that a party has violated any of its promises contained in this Agreement, then such court or
arbitrator may not award such costs or fees against such party. 
 16. Severance Offer Expiration. Mr. Hunkler
acknowledges that he received this Agreement on August 5, 2008. Mr. Hunkler acknowledges that he has been given the opportunity to take at least twenty-one (21) days within which to consider this Agreement before making a decision to
sign this Agreement. If Mr. Hunkler does not sign this Agreement and return to Bradley D. Kohn of MEMC the original Agreement signed by him, pursuant to the terms set forth herein, on or before 5:00 p.m. Central Standard Time on August 26,
2008, the severance offer represented by this Agreement shall be deemed withdrawn and this Agreement shall be null and void, and of no further effect. 
 17. Consideration Period, Revocation Period, and Effective Date. This Agreement shall not be effective until seven (7) calendar days after the date Mr. Hunkler signs and delivers this Agreement
to MEMC. During this seven-day period (the “Revocation Notice Period”), Mr. Hunkler may revoke this Agreement by giving written notice to Bradley D. Kohn of MEMC at 501 Pearl Drive (City of O’Fallon), St. Peters, Missouri
63376, that Mr. Hunkler has decided to revoke the Agreement (the “Revocation Notice”). If no such Revocation Notice is 

 Separation Agreement and General Release 
 Mr. Sean Hunkler and MEMC Electronic Materials, Inc. 
  
  
  

 
timely presented by Mr. Hunkler, this Agreement shall be fully effective and binding upon the parties in accordance with its terms on the eighth
(8th) calendar day after the date that Mr. Hunkler signed and delivered this Agreement to MEMC (“Effective Date”).

 18. Effect of Failure to Deliver Agreement or Revocation of Agreement. If Mr. Hunkler fails to deliver a properly
signed original of the Agreement so that it is received by Bradley D. Kohn at MEMC by 5:00 p.m. Central Standard Time on August 26, 2008 or if that Agreement is revoked by Mr. Hunkler within the Revocation Notice Period, then this
Agreement is void and of no effect, and Mr. Hunkler will not be entitled to the benefits of this Agreement, including those set forth in Paragraph 3, and MEMC will instead immediately pay out the remaining days in his 30-day notice period
described in his Employment Agreement. 
 19. Binding Agreement and Assignment. This Agreement shall be binding upon and inure
to the benefit of Mr. Hunkler and the Releasees, and to MEMC and the Releasors; further, this Agreement and the benefits provided hereunder are not assignable by Mr. Hunkler without MEMC’s express written consent. 
 20. By signing this Agreement, Mr. Hunkler acknowledges: 
 (a) HE HAS READ THIS AGREEMENT COMPLETELY. 
 (b) HE HAS HAD AN OPPORTUNITY TO CONSIDER THE TERMS OF THIS
AGREEMENT. 
 (c) HE HAS BEEN ADVISED TO CONSULT WITH AN ATTORNEY OF HIS CHOOSING PRIOR TO EXECUTING THIS AGREEMENT. 
 (d) HE KNOWS THAT HE IS GIVING UP IMPORTANT LEGAL RIGHTS BY SIGNING THIS AGREEMENT. 
 (e) HE UNDERSTANDS AND MEANS EVERYTHING THAT HE HAS SAID IN THIS AGREEMENT, AND HE AGREES TO ALL ITS TERMS. 
 (f) HE IS NOT RELYING ON MEMC OR ANY REPRESENTATIVE OF MEMC TO EXPLAIN THIS AGREEMENT OR HIS RIGHTS TO HIM. 
 (g) HE HAS HAD AN OPPORTUNITY TO CONSULT AN ATTORNEY AND OTHER ADVISORS TO EXPLAIN THIS AGREEMENT AND ITS CONSEQUENCES TO HIM BEFORE HE SIGNED IT, AND HE
HAS AVAILED HIMSELF OF THIS OPPORTUNITY TO WHATEVER EXTENT HE DESIRED. 
 (h) HE HAS SIGNED THIS AGREEMENT VOLUNTARILY AND ENTIRELY OF HIS
OWN FREE WILL WITHOUT ANY PRESSURE FROM MEMC OR ANY REPRESENTATIVE OF MEMC. 

 Separation Agreement and General Release 
 Mr. Sean Hunkler and MEMC Electronic Materials, Inc. 
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 IN WITNESS WHEREOF, the undersigned parties have signed this Agreement. 
  

					
		 	MEMC ELECTRONIC MATERIALS, INC.
			
		 	By:	 	 /s/ Bradley D. Kohn

		 		 	Bradley D. Kohn
		 		 	Vice President and General Counsel
		
		 	SEAN HUNKLER
		
	Date: 8/12/08	 	 /s/ Sean Hunkler

		 	(Mr. Hunkler’s Signature)

 Separation Agreement and General Release 
 Mr. Sean Hunkler and MEMC Electronic Materials, Inc. 
  
  
  

 Exhibit 1 
 Employment Agreement between Mr. Sean Hunkler and MEMC 
 signed on August 15, 2005Executive Termination Letter Agreement

 Exhibit 10.2 
 

 
 July 7, 2008 
 Delivered in Person 
 Mr. Jean-Marc Pandraud 
 100 Waltham Street 
 Lexington, MA 02421 
 Dear Jean-Marc: 
 You have advised us of your decision to retire as an officer and employee of Entegris, Inc. and of its
subsidiaries (the “Company”). The Company is willing to provide you with certain severance arrangements in connection with your retirement. The purpose of this letter is to confirm the agreement between you and the Company concerning your
retirement and severance arrangements, as follows: 
 1. Resignation. You hereby resign from all positions and offices held by you with
the Company and its subsidiaries effective July 7, 2008 (the “Separation Date”). You agree to provide the Company with reasonable assistance in transitioning your responsibilities to others. You further agree to execute all such other
documents and forms in connection with your resignation as a director and officer of foreign subsidiaries of the Company. 
 2. Payment of
Accrued Rights. You will receive pay for the following: (A) your base salary in effect through the Separation Date, to the extent not previously paid; (B) any bonus or variable compensation earned by you for any
previously completed fiscal year but unpaid as of the Separation Date; (C) reimbursement for any unreimbursed business expenses properly incurred by you in accordance with Company policy prior to the Separation Date and properly
submitted for reimbursement within sixty (60) days following the Separation Date; and (D) such reimbursements and benefits under the Company’s Benefit Plans, if any, to which the you became entitled prior to or on the
Separation Date, including, but not limited to, any vacation accrued but unused through the Separation Date, as determined in accordance with Company policies. 
 3. Severance Benefits. In consideration of your acceptance of this Agreement and subject to your meeting in full your obligations under it, the Company will provide you or, in the event of your death, your
estate, with the following severance pay and benefits: 
  

	(a)	The Company will provide severance pay for a period of twenty-four (24) months following the Separation Date (the “Severance Pay Period”) at your current base
salary of Three Hundred Fifty-Six Thousand Three Hundred Eighty and No/100 Dollars ($356,380.00) per year. Payments will be made in the form of salary continuation and will begin on the next regular Company payday which is at least five business
days following the later of the Separation Date or the date that a copy of this Agreement signed by you is received by the Company. The first payment would be retroactive to the day following the Separation Date. 

  

	(b)	 If you are enrolled in the Company’s medical and dental plans, subject to receipt of any required consent by any health maintenance organization, health
insurance provider or dental insurance provider with which you are enrolled, the Company will continue to pay the premium for these benefits through the earlier of (i) the expiration of twenty-four (24) months following the
Separation Date; or (ii) the date you become eligible for coverage under the health plan of another employer. Upon termination of medical and dental benefits pursuant to clause (i) or (ii) above you may, at your own expense, elect to
continue your participation and that of your eligible dependents in those plans for a period of time under the federal law 

  

 The Materials Integrity Management Company 

 Mr. Jean-Marc Pandraud 
 July 7, 2008 
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known as “COBRA.” In the event that any required consent by any health maintenance organization, health insurance provider or dental insurance
provider with which you are enrolled is denied, and you elect to continue participation under “COBRA”, then the Company will pay the premium for such coverage for the duration of such continuation up to a total of twenty-four
(24) months following the Separation Date provided, however, that in the event that the Company determines that it is unable to continue any such participation, it shall pay the cost, on an after-tax basis, of
comparable coverage. 

  

	(c)	The Company will pay you the bonus payable under the Entegris Incentive Plan for fiscal year 2008 at Target level. This will be paid to you in early 2009 at the same time as
bonuses are paid under the Entegris Incentive Plan to other executives. 

  

	(d)	If you are enrolled in the Company’s group life insurance plan on the Separation Date, subject to receipt of any required consent by any group life insurance provider,
continuation of your participation in the Company’s group life insurance plan until the expiration of twenty-four months following the Separation Date. 

  

	(e)	Notwithstanding anything to the contrary in the Company’s equity-based plans or any equity award agreement between the Company and you, you shall have a period of one
year following the Separation Date to exercise all stock options that are vested and outstanding as of the Separation Date, or until the date such stock options would have expired in the absence of a termination of employment, if earlier.

  

	(f)	The reimbursement for the expense of outplacement services provided by an outplacement firm reasonably selected by you up to an aggregate of Fifteen Thousand and No/100 Dollars
($15,000). 

  

	(g)	Your contributions and the Company’s matching contributions to the Entegris Inc. 401(k) Savings and Profit Sharing Plan (2005 Restatement) shall terminate as of the
Separation Date. The balances in your accounts under the Entegris Inc. 401(k) Savings and Profit Sharing Plan (2005 Restatement) and in the Entegris, Inc. Supplemental Executive Retirement Plan For Key Salaried Employees will be paid out to you in
accordance with the terms of those plans and the requirements of law. 

  

	(h)	The services of the Employee Assistance Program shall, subject to any required consent of the service provider, likewise continue to be available to you through the
earlier of (i) the expiration of twenty-four (24) months following the Separation Date; or (ii) the date you become eligible for coverage under the benefit plan of another employer. 

  

	(i)	You shall be entitled to retain the Company provided computer, cell phone and blackberry through December 31, 2008; likewise, your Entegris e-mail account shall be
continued through December 31, 2008. 

  

	(j)	A final severance payment in an amount equal to: (i) the bonus payable under the Entegris Incentive Plan for fiscal year 2009 at Target level; plus
(ii) the dollar value of all shares of restricted stock outstanding on the Separation Date valued at the higher of the actual market value as of the close of business on the Separation Date or actual market value as of the
close of business on the business day immediately preceding the payment date specified below; plus (iii) the dollar value of one third of the shares covered by unvested stock option awards as of the Separation Date, valued at the
higher of the per share closing price on the Separation Date or on the business day immediately preceding the payment date specified below; plus (iv) the performance share payouts under the 2006 performance share award for
2008 and 2009 at the level earned by the Company’s performance during those years. Payment of this final severance payment shall be made on or before July 7, 2010. 

 Mr. Jean-Marc Pandraud 
 July 7, 2008 
  Page
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 4. Certain Tax Related Payments. Payments and benefits under this Agreement shall be made and
provided without regard to whether the deductibility of such payments (or any other payments or benefits to or for your benefit) would be limited or precluded by Section 280G (“Section 280G”) of the U.S. Internal Revenue Code (the
“Code”) and without regard to whether such payments (or any other payments or benefits) would subject you to the federal excise tax applicable to certain “excess parachute payments” under Section 4999 of the Code (the
“Excise Tax”). If any portion of the payments or benefits to or for your benefit (including, but not limited to, payments and benefits under this Agreement but determined without regard to this paragraph) constitutes an “excess
parachute payment” within the meaning of Section 280G (the aggregate of such payments being hereinafter referred to as the “Excess Parachute Payments”), the Company shall promptly pay to you an additional amount (the
“gross-up payment”) that after reduction for all taxes (including but not limited to the Excise Tax) with respect to such gross-up payment equals the Excise Tax with respect to the Excess Parachute Payments; provided
that to the extent any gross-up payment would be considered “deferred compensation” for purposes of Section 409A of the Code, the manner and time of payment, and the provisions of this Agreement, shall be adjusted to the
extent necessary (but only to the extent necessary) to comply with the requirements of Section 409A with respect to such payment so that the payment does not give rise to the interest or additional tax amounts described at
Section 409A(a)(1)(B) or Section 409A(b)(4) of the Code (the “Section 409A penalties”); and further provided that if, notwithstanding the immediately preceding proviso, the gross-up payment
cannot be made to conform to the requirements of Section 409A of the Code, the amount of the gross-up payment shall be determined without regard to any gross-up for the Section 409A penalties. The determination as to whether your payments
and benefits include Excess Parachute Payments and, if so, the amount of such payments, the amount of any Excise Tax owed with respect thereto, and the amount of any gross-up payment shall be made at the Company’s expense by Ernst &
Young or by such other certified public accounting firm as the Company’s Board of Directors may designate (the “accounting firm”). Notwithstanding the foregoing, if the U.S. Internal Revenue Service shall assert an Excise Tax
liability that is higher than the Excise Tax (if any) determined by the accounting firm, the Company shall promptly augment the gross-up payment to address such higher Excise Tax liability. 
 5. Consulting Services. For the period from the Separation Date through December 31, 2008 (the “Consulting Period”), you agree to
provide the Company with the benefit of your advice and expertise with respect to the business and “customer facing” operations of the Company and to potential growth opportunities for the Company. During the Consulting Period, you will be
available for consultation at such Company or Company customer locations and on such schedule as may be determined by mutual arrangement between you and Bertrand Loy. In addition, you agree to make yourself available for a reasonable number of
telephone and written consultations. In consideration of consulting services to be rendered in accordance with this paragraph the Company agrees to pay you the sum of Seventy-Five Thousand and No/100 Dollars ($75,000.00) within five
(5) business days following the conclusion of the Consulting Period. The Company will also reimburse you for all travel and related out of pocket expenses reasonably incurred by you in the performance of consulting services hereunder in
accordance with the Company’s travel expense reimbursement policies applicable to executive officers. You further agree that the Company shall have the option to renew this consulting arrangement for an additional six month period, through June
2009 at the same compensation, payable at the end of any such renewal Consulting Period; you acknowledge and agree that the exercise of such renewal option shall be in the sole and absolute discretion of the Company. You further acknowledge and
agree that you shall have no authority to bind the Company to any legal obligation and you further agree to disclose your lack of authority in any instance where you reasonably conclude third parties might take action based on a misunderstanding of
your apparent or actual authority. 

 Mr. Jean-Marc Pandraud 
 July 7, 2008 
  Page
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 6. Withholding. All payments made by the Company under this Agreement shall be reduced by any
tax or other amounts required to be withheld by the Company under applicable law and all other deductions authorized by you. 
 7.
Acknowledgement of Full Payment. You acknowledge and agree that the payments provided under paragraphs 2 and 3 of this Agreement are in complete satisfaction of any and all compensation due to you from the Company, whether for services provided
to the Company or otherwise, through the Separation Date and that, except as expressly provided under this Agreement, no further compensation is owed to you. Without limiting the generality of the foregoing, except as provided in paragraph 3 above,
you expressly waive and relinquish any and all rights you have, or might have, to any bonus or other incentive compensation or other compensation, of any kind or description, under any plan or program of the Company. 
 8. Status of Employee Benefits and Paid Time Off. Except as otherwise expressly provided in paragraph 3 of this Agreement, your participation in
all employee benefit plans of the Company shall end as of the Separation Date, in accordance with the terms of those plans. You will not continue to earn vacation or other paid time off after the Separation Date. 
 9. Confidentiality and Non-Disparagement. You agree that you will continue to protect Confidential Information, as defined below, and that you
will not, directly or indirectly, use or disclose it. You also agree that you will not disclose this Agreement or any of its terms or provisions, directly or by implication, except to members of your immediate family and to your legal and tax
advisors, and then only on condition that they agree not to further disclose this Agreement or any of its terms or provisions to others. Further, you agree that, during the Severance Pay Period and thereafter, you will not disparage or criticize the
Company or its Affiliates, their business, management or products, and that you will not otherwise do or say anything that could disrupt the good morale of Company employees or harm the interests or reputation of the Company or any of its
Affiliates. 
 10. Return of Company Documents and Other Property. In signing this Agreement, you represent and warrant that, except
as provided in paragraph 3 above, you have returned to the Company any and all documents, materials and information (whether in hardcopy, on electronic media or otherwise) related to business of the Company or any of its Affiliates and all keys,
access cards, credit cards, computer hardware and software, Blackberries, telephones and telephone-related equipment and all other property of the Company and its Affiliates in your possession or control. Further, you represent and warrant that you
have not retained any copy of any documents, materials or information of the Company or any of its Affiliates (whether in hardcopy, on electronic media or otherwise). Recognizing that your employment with the Company is ending as of the Separation
Date, you agree that, except as provided in paragraph 3 above, you will not thereafter, for any purpose, attempt to access or use any Company computer or computer network or system. Further, you acknowledge that you have disclosed to the Company all
passwords necessary or desirable to enable the Company to access all information which you have password-protected on any of its computer equipment or on its computer network or system. 
 11. Restricted Activities. You acknowledge that during your employment with the Company you have had access to Confidential Information which, if
disclosed, would assist in competition against the Company and agree that the following restrictions on your activities are necessary to protect the goodwill, Confidential Information and other legitimate interests of the Company: 
  

	(a)	 You agree that, during the period from the Separation Date through the expiration of twenty-four (24) months following the Separation Date, you will
not, directly or indirectly, whether as owner, partner, investor, consultant, agent, employee, co-venturer or otherwise, compete 

 Mr. Jean-Marc Pandraud 
 July 7, 2008 
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with the Company within the United States or in any other country in which the Company was doing business, or planning to do business, as of the Separation
Date. Specifically, but without limiting the foregoing, you agree not to work or provide services, in any capacity, whether as an employee, independent contractor or otherwise, whether with or without compensation, to any Person, as defined below,
that is engaged in any business that is competitive with the business of the Company, as conducted or in planning during your employment with the Company, unless the Company agrees, in advance and in writing, signed by an expressly authorized
representative of the Company, to your working or providing services for a specified Person. The Company will so agree provided that it determines, in its sole discretion, that your acceptance of a position with such person or your provision of such
work or services will not result in the use or disclosure of Confidential Information. You agree that the Company’s consent shall be acquired prior to accepting any such position or commencing any business activity which could be inconsistent
with your obligations under this Agreement. You agree to provide the Company with all information that it may reasonably request in order to make a determination as contemplated hereunder. 

  

	(b)	You agree that during the period from the Separation Date through the expiration of twenty-four (24) months following the Separation Date, you will not, directly or
indirectly, (i) hire any employee of the Company or seek to persuade any employee of the Company to discontinue employment or (ii) solicit or encourage any independent contractor providing services to the Company to terminate or diminish
its/his/her relationship with the Company. 

  

	(c)	In signing this Agreement, you give the Company assurance that you have carefully read and considered all the terms and conditions of this Agreement, including the restraints
imposed on you under this paragraph 10. You agree without reservation that these restraints are necessary for the reasonable and proper protection of the Company and that each and every one of the restraints is reasonable in respect to subject
matter, length of time and geographic area. You further agree that, were you to breach any of the covenants contained in paragraph 9 or 10 above or of this paragraph 11, the damage to the Company would be irreparable. You therefore agree that the
Company, in addition to any other remedies available to it, shall be entitled to preliminary and permanent injunctive relief against any breach or threatened breach by you of any of those covenants, without having to post bond. You and the Company
further agree that, in the event that any provision of paragraph 9 or 10 above or of this paragraph 11 is determined by any court of competent jurisdiction to be unenforceable by reason of its being extended over too great a time, too large a
geographic area or too great a range of activities, that provision shall be deemed to be modified to permit its enforcement to the maximum extent permitted by law. 

 12. Employee Cooperation. You agree to cooperate with the Company hereafter with respect to all matters arising during or related to your
employment, including but not limited to all matters in connection with any transition of duties to others, governmental investigation, litigation or regulatory or other proceeding which may have arisen or which may arise following the signing of
this Agreement. The Company will reimburse your out-of-pocket expenses incurred in complying with Company requests hereunder, provided such expenses are authorized by the Company in advance. In the event that such cooperation requires that you
devote working time after the expiration of twenty-four (24) months following the Separation Date, the Company agrees to provide you with reasonable compensation for your services. 

 Mr. Jean-Marc Pandraud 
 July 7, 2008 
  Page
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 of 8 
  

 13. Release of Claims.  
  

	(a)	In exchange for the severance pay and other benefits provided you under this Agreement, to which you would not otherwise be entitled, on your own behalf and that of your
heirs, executors, administrators, beneficiaries, personal representatives and assigns, you agree that this Agreement shall be in complete and final settlement of any and all causes of action, rights or claims that you have had in the past, now have,
or might now have, whether known or unknown, of any kind or description, including without limitation any causes of action, rights or claims in any way related to, connected with or arising out of your employment or its termination or pursuant to
Title VII of the Civil Rights Act, the Americans with Disabilities Act, the Age Discrimination in Employment Act, the fair employment practices statutes of the state or states in which you have provided services to the Company or any of its
Affiliates or any other federal, state or local law, regulation or other requirement and you hereby release and forever discharge the Company and its Affiliates and all of their respective past and present directors, shareholders, officers,
employees, general and limited partners, members, managers, agents and representatives, their successors and assigns, and all others connected with them, and all employee benefit plans maintained by the Company and all trustees and plan
administrators of such plans, both individually and in the official capacities of each of the foregoing individually, from any and all such causes of action, rights or claims. This release shall not apply to any claim for breach by the Company of
its obligations under this Agreement. 

  

	(b)	This Agreement, including the release of claims set forth in the paragraph directly above, creates legally binding obligations and the Company has advised you to consult an
attorney before signing this Agreement. In signing this Agreement, you give the Company assurance that you have signed it voluntarily and with a full understanding of its terms; that you have had sufficient opportunity, before signing this
Agreement, to consider its terms and to consult with any of those persons to whom reference in made in the second sentence of paragraph 9 above; that you have consulted with an attorney of your choosing; and that, in signing this Agreement, you have
not relied on any promises or representations, express or implied, that are not set forth expressly in this Agreement. 

 14. Definitions. As used in this Agreement: 
 “Affiliates” means any and all persons and entities controlling,
controlled by or under common control with the Company, where control may be by management authority or equity interest. 
 “Confidential Information” means any and all information of the Company and its Affiliates that is not generally known to the public including, without limitation, all strategic business plans, marketing and sales data and
information, all financial, technical personnel, manufacturing, operations, product and systems information. Confidential Information also includes all information received by the Company or any of its Affiliates from customers or other third
parties with any understanding, express or implied, that the information would not be disclosed. 
 “Person” means an individual, a
corporation, a limited liability company, an association, a partnership, an estate, a trust or any other entity or organization, other than the Company or any of its Affiliates. 

 Mr. Jean-Marc Pandraud 
 July 7, 2008 
  Page
 7
 of 8 
  

 15. Miscellaneous. 
  

	(a)	This Agreement constitutes the entire agreement between you and the Company relating to the termination of your employment by the Company and supersedes all prior and
contemporaneous communications, agreements and understandings whether written or oral, with respect to your employment, its termination and all related matters, excluding only your obligations with respect to the securities of the Company, all of
which shall remain in full force and effect in accordance with their terms. 

  

	(b)	This Agreement may not be modified or amended, and no breach shall be deemed to be waived, unless agreed to in writing by you and the Chief Executive Officer of the Company
or his expressly authorized designee. The captions and headings in this Agreement are for convenience of reference only and in no way define or describe the scope or content of any provision of this Agreement. This is a Massachusetts contract and
shall be governed and construed in accordance with the laws of the Commonwealth of Massachusetts, without regard to the conflict-of-law principles thereof. 

  

	(c)	If the duration of, scope of, or any business activity covered by this Agreement is in excess of what is valid and enforceable under applicable law, such provision will be
construed to cover only that duration, scope, or activity that is valid and enforceable. You acknowledge that this Section 15(c) will be given the construction which renders its provisions valid and enforceable to the maximum extent, not
exceeding its express terms, possible under applicable laws. 

  

	(d)	The obligation of the Company under paragraphs 2 and 3 of this Agreement are expressly conditioned upon your continued full performance of your obligations under this
Agreement. 

  

	(e)	The amounts payable to you hereunder shall be absolutely owing, and not subject to reduction or mitigation as a result of employment by you elsewhere after the Separation
Date. 

  

	(f)	There shall be no right of set-off or counterclaim in respect of any claim, debt or obligation against any payments to you, your dependents, beneficiaries or estate, provided
for in this Agreement. 

  

	(g)	The Company will indemnify you for all costs and expenses (including fees and expenses of counsel) incurred by you in connection with an action to enforce you rights under
this Agreement (including any action to enforce this right of indemnity) in which action you prevail. 

  

	(h)	No right, benefit or interest hereunder shall be subject to anticipation, alienation, sale, assignment, encumbrance, charge, pledge, hypothecation, or set-off in respect of
any claim, debt or obligation, or to execution, attachment, levy or similar process, or assignment by operation of law. Any attempt, voluntary or involuntary, to effect any action specified in the immediately preceding sentence shall, to the full
extent permitted by law, be null, void and of no effect. 

  

	(i)	No right or interest to or in any payments shall be assignable by you; provided, however, that this provision shall not preclude you from
designating one or more beneficiaries to receive any amount that may be payable after your death and shall not preclude the legal representative of your estate from assigning any right hereunder to the person or persons entitled thereto under your
will or, in the case of intestacy, to the person or persons entitled thereto under the laws of intestacy applicable to your estate. 

  

	(j)	 The Company agrees that to the extent that its obligations hereunder remain unfulfilled, it shall require that any entity with which it merges or
consolidates or to which it agrees to transfer substantially all of its assets expressly assume the obligations of the Company under this 

 Mr. Jean-Marc Pandraud 
 July 7, 2008 
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Agreement (including exercise of options vested pursuant to Paragraph 3(ej) above by a successor or award of substituted options by such) and that any
successor or successors of such an entity, whether by merger, consolidation or transfer of assets, also expressly assume all such obligations. Notwithstanding the foregoing, the Company shall not be deemed to have breached its obligations under this
subparagraph 15(j) if it negotiates with any successor entity to provide a substitute agreement on terms (which may be different than the terms herein) that are reasonably acceptable to you. 

 If the terms of this Agreement are acceptable to you, please sign, date and return it to me within forty-five (45) days following the date you
receive it. You may revoke this Agreement at any time during the seven (7) day period immediately following the date of your signing. If you do not revoke it, then, at the expiration of that seven (7) day period, this letter will take
effect as a legally-binding agreement between you and the Company on the basis set forth above. The enclosed copy of this letter, which you should also sign and date, is for your records. 
  

	
	Sincerely,
	
	ENTEGRIS, INC.
	
	 /s/ GIDEON ARGOV

	 Gideon Argov
 President and Chief Executive
Officer

 Accepted and agreed: 
  

			
	Signature:	 	 /s/ JEAN-MARC PANDRAUD

		
	Date:	 	7/7/2008

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