Second Addendum to Foundry Service Agreement



 EXHIBIT 10.18 
 NOTE: Portions of this Exhibit are the subject of a Confidential Treatment Request by the Registrant to the Securities and Exchange Commission (the “Commission”). Such portions have been
redacted and are marked with a “[***]” in the place of the redacted language. The redacted information has been filed separately with the Commission. 
 Second Addendum 
 to the 
 FOUNDRY AGREEMENT 
 THIS Second
Addendum (the “Second Addendum”) to the Foundry Agreement dated January 10, 2002 (the “Foundry Agreement”) is made effective as of the 11th day of April, 2007 (“Effective Date”) by and between Shanghai Hua Hong NEC
Electronics Company Limited., a Chinese limited liability company with offices at No. 1188 Chuan Qiao Road, Pu Dong New District, Shanghai, China (“HHNEC”), and Alpha and Omega Semiconductor Limited, a Bermuda exempted company with
offices at 495 Mercury Drive, Sunnyvale, California 94085, USA (“AOS”). 
 WHEREAS HHNEC and AOS entered into the Foundry Agreement
desiring to establish a long-term strategic partnership and to use their best efforts to ensure the success of both parties in a timely and successful fashion; 
 WHEREAS HHNEC entered into the Foundry Agreement to exclusively manufacture power double diffused metal oxide semiconductor (“DMOS”) products for AOS for an initial Term (as defined in the
Foundry Agreement) of five years, during which HHNEC will not enter into any agreement for production, supply and/or service related to any DMOS products with any customers except AOS; 
 WHEREAS HHNEC and AOS entered into the First Addendum to the Foundry Agreement (the “First Addendum”) dated July 28, 2005 to renew and extend the Foundry Agreement to a subsequent Term of
five years immediately after the initial Term; 
 WHEREAS HHNEC and AOS now desire to further amend the Foundry Agreement and the First Addendum
thereto in response to market reality as perceived by HHNEC; 
 NOW, THEREFORE, for valid and sufficient consideration, and pursuant to
Section 10.9 of the Foundry Agreement, HHNEC and AOS agree as follows: 
  

	1.	In response to HHNEC’s request, AOS agrees to release HHNEC from the exclusivity obligations. Both AOS and HHNEC agree to delete the entire Section 3.7 of the
Foundry Agreement where an exclusivity clause is specified provided that both parties shall mutually respect and shall not infringe each other’s Intellectual Property Rights. 

  

	2.	In partial consideration of AOS’s agreement to delete Section 3.7 of the Foundry Agreement, HHNEC agrees to provide the pricing structure based on monthly
delivery as follows, 

  

	 	(a)	[***] per wafer for the first [***] wafers per month; 

  

	 	(b)	[***] per wafer for additional quantity between [***] to [***] wafers per month; and 

  

	 	(c)	[***] per wafer for additional quantity above [***] wafers per month. 

 Notwithstanding the pricing structure provided above, all purchase orders issued by AOS to HHNEC and all quotations for special prices provided to AOS by HHNEC prior to the Effective Date of this Second
Addendum shall remain in full force until the expiration of said purchase orders and quotations. (For example, the special price for wafer type NA71/N531 in HHNEC’s Quotation #HH-S-1065 shall remain in full force.) 
  
 ***CONFIDENTIAL PORTIONS OMITTED AND FILED SEPARATELY WITH THE
COMMISSION*** 
  

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 HHNEC CONFIDENTIAL 
  
  

	3.	HHNEC shall NOT enter into any agreement for production, supply, and/or service related to any trench DMOS products from any direct customers that are headquartered in
Taiwan and/or have substantial control entity in Taiwan without prior approval by AOS. 

  

	4.	AOS shall commit and take delivery of an average of [***] wafers per month from the Effective Date of this Second Addendum until the end of June 2008, and shall commit
and take delivery of an average of [***] wafers per month thereafter, PROVIDED THAT AOS CONTINUES TO RECEIVE A PRICING STRUCTURE FROM HHNEC THAT IS COMPETITIVE WITH THEN INDUSTRY PRICE FOR LIKE WAFERS. 

  

	5.	Both HHNEC and AOS agree to delete the whole Section 2 of the First Addendum, titled “Production Volume Commitment Table” in its entirety.


  

	6.	The following sentence is added to the end of Section 7.3 of the Foundry Agreement: “Neither HHNEC nor AOS shall disclose the existence or terms of the First
Addendum or the Second Addendum to any third party without the prior written consent of the other party, except as required by applicable laws.” 

  

	7.	Except as to the subject matter expressly modified in this Second Addendum, the Foundry Agreement, as amended by the First Addendum, shall remain in full force and
effect in all respects. In the event of a conflict between the expressly amended terms in this Second Addendum and the Foundry Agreement or First Addendum, the expressly amended terms of this Second Addendum shall govern. 


IN WITNESS WHEREOF, HHNEC and AOS have caused this Second Addendum to the Foundry Agreement to be executed by their duly authorized representatives on
the date first written above. 
  
 ***CONFIDENTIAL
PORTIONS OMITTED AND FILED SEPARATELY WITH THE COMMISSION*** 
  

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 HHNEC CONFIDENTIAL 
  
  

							
	HHNEC	  	AOS
		
	Shanghai Hua Hong NEC Electronics Co., Ltd.	  	Alpha & Omega Semiconductor Ltd.
				
	 By
	 	 /s/ Tony Chuang
	  	By	 	 /s/ Yueh-Se Ho

				
	 Name:
	 	Tony Chuang	  	Name:	 	Yueh-Se Ho
				
	 Title:
	 	Vice President	  	Title:	 	Chief Operating Officer
				
	 Date:
	 	April 11, 2007	  	Date:	 	April 11, 2007

  

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