EX-4.2





 Exhibit 4.2 

KLA-TENCOR CORPORATION 

Officer’s Certificate 

March 20, 2019 
 Reference
is made to the Indenture dated as of November 6, 2014 (the “Indenture”) between KLA-Tencor Corporation (the “Company,”) and Wells Fargo Bank, National Association, as
trustee (the “Trustee”). Pursuant to Sections 102, 201 and 301 of the Indenture, the undersigned officer does hereby certify, in connection with the issuance of $800,000,000 aggregate principal amount of 4.10% Senior Notes due
2029 (the “2029 Notes”) and $400,000,000 aggregate principal amount of 5.00% Senior Notes due 2049 (the “2049 Notes” and, together with the 2029 Notes, the “Notes”): 

1. The undersigned has read all such covenants or conditions and the definitions relating thereto provided for in the Indenture
relating to the issuance, delivery and authentication of the Notes pursuant to Section 301 of the Indenture. 
 2. The
statements of the undersigned contained herein are based upon a review of the Indenture and upon an examination of the relevant records of the Company. 

3. The undersigned has, in the opinion of such individual, made such examination or investigation as is necessary to enable him
to express an informed opinion as to whether or not such covenants or conditions relating thereto has been complied with. 

4. In the opinion of the undersigned, such conditions or covenants contained in the Indenture relating to the issuance,
delivery and authentication of the Notes have been complied with. 
 Capitalized terms used but not otherwise defined herein shall have the
meanings specified in the Indenture. 












 The undersigned does hereby certify, in connection with the issuance of the Notes, that the
terms of the Notes are as follows: 
  

					
	Company:	  	KLA-Tencor Corporation
		
	Trustee, Registrar, Transfer Agent, Authenticating Agent, and Paying Agent:	  	Wells Fargo Bank, National Association
			
	Title:	  	4.10% Senior Notes due 2029	  	5.00% Senior Notes due 2049
			
	Aggregate Principal Amount at Maturity:	  	$800,000,000	  	$400,000,000
			
	Maturity:	  	March 15, 2029	  	March 15, 2049
			
	Interest:	  	4.10% per annum	  	5.00% per annum
		
	Date from which Interest will Accrue:	  	March 20, 2019
		
	Principal and Interest Payment Place:	  	             

Wells Fargo Bank, National Association
 600 South Fourth Street,
7th Floor
 Minneapolis, Minnesota 55415
 Attention: Corporate
Trust Operations

		
	Interest Payment Dates:	  	 March 15 and September 15 of each year, commencing on September 15, 2019.

 
 Interest on the Notes shall be computed on the basis of a
360-day year of twelve 30-day months.

		
	Optional Redemption:	  	The Company may at its option redeem each series of Notes, in whole or in part, at any time prior to their maturity on at least 30 but not more than 60 days’ prior notice to each Holder of the Notes to be
redeemed. Notice to the Holders and the Trustee shall be given as set forth in the Indenture.
		
		  	 The redemption price will be equal to the greater of:

 
 (1) 100% of the principal amount of the Notes
to be redeemed or















			
		  	 (2) the sum of the present values of the Remaining Scheduled Payments (as defined in the Notes) discounted to the redemption date on a
semiannual basis (assuming a 360-day year consisting of twelve 30-day months), at a rate equal to the sum of the Treasury Rate (as defined in the Notes) plus:

 
 •  25 basis points in the case
of the 2029 Notes, and
  
 •  30
basis points in the case of the 2049 Notes,
  
 plus, in the case of each of clauses
(1) and (2), accrued and unpaid interest to, but not including, the redemption date;
  

provided that, if the Company redeems:
  

•  any 2029 Notes on or after December 15, 2028, or

 
 •  any 2049 Notes on or after
September 15, 2048,
  
 then the redemption price for those Notes will equal 100%
of the aggregate principal amount of the Notes to be redeemed, plus accrued and unpaid interest to, but not including, the relevant redemption date.

		
	Conversion:	  	None.
		
	Sinking Fund:	  	None.
		
	Denominations:	  	$2,000 and multiples of $1,000 thereafter
		
	Change of Control:	  	Upon the occurrence of a Change of Control Triggering Event (as defined in the Notes under “Offer to Repurchase Upon Change of Control Triggering Event”), the Company will be required to make an offer to purchase the Notes
at a price equal to 101% of their principal amount plus accrued and unpaid interest to the date of repurchase.
		
	Miscellaneous:	  	The terms of the Notes shall include such other terms as are set forth in the form of Notes attached hereto as Exhibit A and in the Indenture.

 [Signature Page Follows] 












 IN WITNESS WHEREOF, the undersigned has hereunto executed this Officer’s Certificate
and caused it to be delivered as of the date first written above. 
  

			
	Name:	 	Bren Higgins
	Title:	 	 Executive Vice President and
 Chief Financial
Officer



 [Signature page to Officer’s Certificate Pursuant to the Indenture] 












 EXHIBIT A 

[FORM OF FACE OF SECURITY] 

KLA-TENCOR CORPORATION 

[Global Securities Legend] 
 THIS GLOBAL SECURITY
IS HELD BY AND REGISTERED IN THE NAME OF THE DEPOSITARY (AS DEFINED IN THE INDENTURE GOVERNING THIS SECURITY) OR ITS NOMINEE IN CUSTODY FOR THE BENEFIT OF THE BENEFICIAL OWNERS HEREOF, IS NOT EXCHANGEABLE FOR SECURITIES REGISTERED IN THE NAME OF A
PERSON OTHER THAN THE DEPOSITARY OR ITS NOMINEE EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE, AND IS NOT TRANSFERABLE TO ANY PERSON UNDER ANY CIRCUMSTANCES EXCEPT THAT (I) THE TRUSTEE MAY MAKE SUCH NOTATIONS HEREON AS MAY BE
REQUIRED PURSUANT TO SECTION 203 OF THE INDENTURE, (II) THIS GLOBAL SECURITY MAY BE EXCHANGED PURSUANT TO SECTION 203(a) OF THE INDENTURE, (III) THIS GLOBAL SECURITY MAY BE DELIVERED TO THE TRUSTEE FOR CANCELLATION PURSUANT TO
SECTION 306 OF THE INDENTURE AND (IV) THIS GLOBAL SECURITY MAY BE TRANSFERRED TO A SUCCESSOR DEPOSITARY WITH THE PRIOR WRITTEN CONSENT OF THE COMPANY. 

UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), TO THE ISSUER
OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO
CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF,
CEDE & CO., HAS AN INTEREST HEREIN. 












 [Form of Face of Security] 

KLA-TENCOR CORPORATION 

        % SENIOR NOTE DUE 20         

CUSIP No._________ 
 ISIN
No._________ 
 No. _________    $_________ 

KLA-TENCOR CORPORATION, a corporation duly organized and existing under the laws of the State of
Delaware (herein called the “Company”, which term includes any successor Person under the Indenture hereinafter referred to), for value received, hereby promises to pay to CEDE & CO., or registered assigns, the principal
sum of                  dollars on                 ,
                 which aggregate principal amount may from time to time be reduced or increased, as appropriate, in accordance with the within-mentioned Indenture and as
reflected in the Schedule of Exchanges of Interests in the Global Security attached hereto, to reflect exchanges or redemptions of the Securities represented hereby, and to pay interest thereon from March 20, 2019 or from the most recent
Interest Payment Date to which interest has been paid or duly provided for, semi-annually on March 15 and September 15 in each year, commencing September 15, 2019, at the rate of          % per
annum, until the principal hereof is paid or made available for payment, provided, however that any principal and premium, and any such installment of interest, which is overdue shall bear interest at the rate of
        % per annum (to the extent that the payment of such interest shall be legally enforceable), from the dates such amounts are due until they are paid or made available for payment, and such interest
shall be payable on demand. Interest on the Notes shall be computed on the basis of a 360-day year of twelve 30-day months. The interest so payable, and punctually paid
or duly provided for, on any Interest Payment Date will, as provided in such Indenture, be paid to the Person in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on the Regular Record Date for
such interest, which shall be the March 1 or September 1 (whether or not a Business Day), as the case may be, next preceding such Interest Payment Date. Any such interest not so punctually paid or duly provided for will forthwith cease to
be payable to the Holder on such Regular Record Date and may either be paid to the Person in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on a Special Record Date for the payment of such
Defaulted Interest to be fixed by the Trustee, notice whereof shall be given to Holder of the Securities not less than 10 days prior to such Special Record Date. 

Payment of the principal of (and premium, if any) and any such interest on this Security will be made at the office or agency of the Company
maintained for that purpose in Minneapolis, Minnesota, in accordance with the terms of the Indenture referred to or the reverse hereof in such coin or currency of the United States of America as at the time of payment is legal tender for payment of
public and private debts. 












 Reference is hereby made to the further provisions of this Security set forth on the reverse
hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. 
 This Security shall be deemed
to be a contract made under the laws of the State of New York, and for all purposes shall be construed in accordance with and governed by the laws of said state. 

Unless the certificate of authentication hereon has been executed by the Trustee referred to on the reverse hereof by manual signature, this
Security shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose. 












 IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed. 

 

					
	KLA-TENCOR CORPORATION
		
	By:	 	 
		 	Name:	 	Bren Higgins
		 	Title:	 	Executive Vice President and
		 		 	Chief Financial Officer














 CERTIFICATE OF AUTHENTICATION 

This is one of the Securities designated therein referred to in the within-mentioned Indenture. 

Dated: ______________________ 
  

			
	 WELLS FARGO BANK,
 NATIONAL
ASSOCIATION, as Trustee

		
	By:	 	 
		 	Authorized Signatory














 [Form of Reverse of Security] 

This Security is one of a duly authorized issue of securities of the Company (herein called the “Securities”), issued and to
be issued in one or more series under an Indenture, dated as of November 6, 2014 (herein called the “Indenture”, which term shall have the meaning assigned to it in such instrument), between the Company and Wells Fargo Bank,
National Association, as Trustee (herein called the “Trustee”, which term includes any successor trustee under the Indenture), and reference is hereby made to the Indenture for a statement of the respective rights, limitations of
rights, duties and immunities thereunder of the Company, the Trustee and the Holders of the Securities and of the terms upon which the Securities are, and are to be, authenticated and delivered. This Security is one of the series designated on the
face hereof, initially limited in aggregate principal amount to $                . 

1. Interest. 
 The Company
promises to pay interest on the principal amount of this Security at the rate per annum described above. 
 No reference herein to the
Indenture and no provision of this Security or of the Indenture shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay the principal of and any premium and interest on this Security at the times, place and
rate, and in the coin or currency, herein prescribed. 
 2. Paying Agent. 

Initially, Wells Fargo Bank, National Association (the “Trustee”) will act as paying agent. The Company may change any paying
agent without notice to the Holders. 
 3. Indenture; Defined Terms. 

This Security is one of the         % Senior Notes due
20         established pursuant to an Officer’s Certificate dated March 20, 2019 and issued pursuant to Sections 102, 201 and 301 of the Indenture. 

For purposes of this Security, unless otherwise defined herein, capitalized terms herein are used as defined in the Indenture. To the extent
the terms of the Indenture and this Security are inconsistent, the terms of the Indenture shall govern. 
 4. Denominations; Transfer;
Exchange. 
 As provided in the Indenture and subject to certain limitations therein set forth, the transfer of this Security may be
registered and this Security may be exchanged as provided in the Indenture. 
 The Securities are issuable only in registered form without
coupons in denominations of $2,000 and any integral multiple of $1,000 in excess thereof. 












 No service charge shall be made for any such registration of transfer or exchange, but the
Company may require payment of a sum sufficient to cover any tax or other governmental charge payable in connection therewith. 
 Prior to
due presentment of this Security for registration of transfer, the Company, the Trustee and any agent of the Company or the Trustee may treat the Person in whose name this Security is registered as the owner hereof for all purposes, whether or not
this Security be overdue, and neither the Company, the Trustee nor any such agent shall be affected by notice to the contrary. 
 5.
Amendment; Supplement; Waiver. 
 The Indenture permits, with certain exceptions as therein provided, the amendment thereof and the
modification of the rights and obligations of the Company and the rights of the Holders of the Securities to be affected under the Indenture at any time by the Company and the Trustee with the consent of the Holders of a majority in aggregate
principal amount of the Securities at the time Outstanding of each series to be affected. The Indenture also contains provisions permitting the Holders of specified percentages in aggregate principal amount of the Securities at the time Outstanding,
on behalf of the Holders of all the Securities, to waive compliance by the Company with certain provisions of the Indenture and certain past defaults under the Indenture and their consequences. Any such consent or waiver by the Holder of this
Security shall be conclusive and binding upon such Holder and upon all future Holders of this Security and of any Security issued upon the registration of transfer hereof or in exchange herefor or in lieu hereof, whether or not notation of such
consent or waiver is made upon this Security. 
 6. Redemption. 

The Company may at its option redeem the Securities, in whole or in part, at any time prior to their maturity on at least 30 but not more than
60 days’ prior notice to each Holder of the Securities to be redeemed. Notice to the Holders and the Trustee shall be given as set forth in the Indenture. 

The redemption price will be equal to the greater of: 
 (1) 100%
of the principal amount of the Securities to be redeemed or 
 (2) the sum of the present values of the Remaining Scheduled Payments discounted to the
redemption date on a semiannual basis (assuming a 360-day year consisting of twelve 30-day months), at a rate equal to the sum of the Treasury Rate plus
                 basis points, plus, in the case of each of clauses (1) and (2), accrued and unpaid interest to, but not including, the redemption date;
provided, if the Company redeems the Securities on or after                  (the “Par Call Date”), then the redemption price for the Securities
will equal 100% of the aggregate principal amount of the Securities to be redeemed, plus accrued and unpaid interest to, but not including, the redemption date. 












 “Comparable Treasury Issue” means the United States Treasury security or
securities selected by an Independent Investment Banker as having an actual or interpolated maturity comparable to the remaining term of the Securities to be redeemed that would be utilized, at the time of selection and in accordance with customary
financial practice, in pricing new issues of corporate debt securities of a comparable maturity to the Par Call Date. 
 “Comparable
Treasury Price” means, with respect to any redemption date, (1) the average of the Reference Treasury Dealer Quotations for such redemption date after excluding the highest and lowest of such Reference Treasury Dealer Quotations, or
(2) if the Company obtains fewer than four such Reference Treasury Dealer Quotations, the average of all such quotations. 

“Independent Investment Banker” means one of the Reference Treasury Dealers, appointed by the Company. 

“Reference Treasury Dealer” means J.P. Morgan Securities LLC and its affiliates, their respective successors and three other
nationally recognized investment banking firms that are primary U.S. government securities dealers as selected by the Company. If any of the foregoing or their affiliates shall cease to be a primary U.S. government securities dealer in The City of
New York (a “Primary Treasury Dealer”), the Company will substitute therefor another Primary Treasury Dealer. 

“Reference Treasury Dealer Quotations” means, with respect to each Reference Treasury Dealer and any redemption date, the
average, as determined by the Company, of the bid and ask prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in writing to the Company by such Reference Treasury Dealer at 3:30 p.m., New
York City time, on the third business day preceding such redemption date. 
 “Remaining Scheduled Payments” means, with
respect to the Securities to be redeemed, the remaining scheduled payments of principal of and interest on the Securities that would be due after the related redemption date but for the redemption (assuming maturity of such Securities on the Par
Call Date). If that redemption date is not an Interest Payment Date with respect to the Securities subject to redemption, the amount of the next succeeding scheduled interest payment on the Securities will be reduced by the amount of interest
accrued on the Securities to the redemption date. 
 “Treasury Rate” means, with respect to any redemption date, the rate
per annum equal to the semiannual equivalent yield to maturity or interpolation (on a day count basis) of the interpolated Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue (expressed as a percentage of its principal
amount) equal to the Comparable Treasury Price for such redemption date. 
 On and after the redemption date, interest will cease to accrue
on the Securities or any portion thereof called for redemption, unless the Company defaults in the payment of the redemption price and accrued interest. On or before the redemption date, the Company will deposit with a paying agent or the Trustee
money sufficient to pay the redemption price of, and accrued interest on, the Securities to be redeemed on that date. Calculation of the redemption price will be made by the Company or on its behalf by such person as the Company may designate;
provided that such calculation or the correctness thereof shall not be a duty or obligation of the Trustee. 












 7. Offer to Repurchase Upon Change of Control Triggering Event 

Upon the occurrence of a Change of Control Triggering Event (as defined below) with respect to the Securities, unless the Company shall have
exercised its right pursuant to Section 6 hereof to redeem the Securities, the Company will be required to make an offer to repurchase all or, at the Holder’s option, any part (equal to $2,000 or any integral multiple of $1,000 in excess
thereof), of each Holder’s Securities pursuant to the offer described below (the “Change of Control Offer”). In the Change of Control Offer, the Company will be required to offer payment in cash equal to 101% of the aggregate
principal amount of Securities repurchased plus accrued and unpaid interest, if any, on the Securities repurchased, to, but not including, the date of purchase (the “Change of Control Payment”). 

Within 30 days following any Change of Control Triggering Event with respect to the Securities, the Company will be required to give notice to
Holders of the Securities, with a copy to the Trustee, describing the transaction or transactions that constitute the Change of Control Triggering Event and offering to repurchase the Securities on the date specified in the notice, which date will
be no earlier than 30 and no later than 60 days from the date such notice is given (the “Change of Control Payment Date”), pursuant to the procedures required by the Securities and described in such notice. The Company must comply
with the requirements of applicable securities laws and regulations in connection with the repurchase of the Securities as a result of a Change of Control Triggering Event. 

On the Change of Control Payment Date, the Company will be required, to the extent lawful, to: 

 

	 	•	 	 accept for payment the Securities or portions of the Securities properly tendered pursuant to the Change of
Control Offer; 


  

	 	•	 	 deposit with the Paying Agent an amount equal to the Change of Control Payment in respect of the Securities or
portions of the Securities properly tendered; and 


  

	 	•	 	 deliver or cause to be delivered to the Trustee the Securities properly accepted together with an Officer’s
Certificate stating the aggregate principal amount of the Securities or portions of the Securities being purchased by the Company. 



The Paying Agent will be required to promptly give, to each Holder who properly tendered Securities, the purchase price for the Securities,
and the Trustee will be required to promptly authenticate and mail (or cause to be transferred by book entry) to each such Holder a new Security equal in principal amount to any unpurchased portion of the Securities surrendered, if any; provided
that each new Security will be in a principal amount of $2,000 or an integral multiple of $1,000 in excess thereof. 












 The Company will not be required to make a Change of Control Offer upon a Change of Control
Triggering Event if a third party makes such an offer in the manner, at the times and otherwise in compliance with the requirements for an offer made by the Company and such third party purchases all Securities properly tendered and not withdrawn
under its offer. In the event that such third party terminates or otherwise fails to complete its offer, the Company will be required to make a Change of Control Offer treating the date of such termination or default as though it were the date of
the Change of Control Triggering Event. 
 The Company will comply with the requirements of Rule
14e-1 under the Exchange Act, and any other securities laws and regulations thereunder to the extent those laws and regulations are applicable in connection with the repurchase of the Securities as a result of
a Change of Control Triggering Event. To the extent that the provision of any such securities laws or regulations conflicts with this Section 7, the Company will comply with those securities laws and regulations and will not be deemed to have
breached the Company’s obligations under this Section 7 by virtue of any such conflict. For purposes of this Section 7, the following terms will be applicable: 

“Change of Control” means the occurrence of any one of the following: (1) the direct or indirect sale, lease, transfer,
conveyance or other disposition (other than by way of merger, amalgamation, arrangement or consolidation), in one or a series of related transactions, of all or substantially all of the Company’s properties or assets and those of its
subsidiaries, taken as a whole, to one or more persons, other than to the Company or one of its subsidiaries; (2) the first day on which a majority of the members of the Board of Directors of the Company is not composed of Continuing Directors
(as defined below); (3) the consummation of any transaction including, without limitation, any merger, amalgamation, arrangement or consolidation the result of which is that any person becomes the beneficial owner, directly or indirectly, of more
than 50% of the Company’s Voting Stock; (4) the Company consolidates with, or merges with or into, any person, or any person consolidates with, or merges with or into, the Company, in any such event pursuant to a transaction in which any
of the outstanding Voting Stock of the Company or of such other person is converted into or exchanged for cash, securities or other property, other than any such transaction where the shares of the Company’s Voting Stock outstanding immediately
prior to such transaction constitute, or are converted into or exchanged for, a majority of the Voting Stock of the surviving person immediately after giving effect to such transaction; or (5) the adoption of a plan relating to the
Company’s liquidation or dissolution. For the purposes of this definition, “person” and “beneficial owner” have the meanings used in Section 13(d) of the Exchange Act. 

“Change of Control Triggering Event” means the Securities cease to be rated Investment Grade by at least two of the three
Rating Agencies on any date during the period (the “Trigger Period”) commencing on the date of the first public notice of the occurrence of a Change of Control or the Company’s intention to effect a Change of Control and ending
60 days following consummation of such Change of Control (which Trigger Period will be extended following consummation of a Change of Control for so long as any of the Rating Agencies has publicly announced that it is considering a possible ratings
change). Unless at least two of the three Rating Agencies are providing a rating for the Securities at the commencement of any Trigger Period, the Securities will be deemed to have ceased to be rated Investment Grade by at least two of the three
Rating Agencies during that Trigger Period. Notwithstanding the foregoing, no Change of Control Triggering Event will be deemed to have occurred in connection with any particular Change of Control unless and until such Change of Control has actually
been consummated. 












 “Continuing Directors” means, as of any date of determination, any member
of the Board of Directors of the Company who (1) was a member of the Board of Directors of the Company on the Issue Date; or (2) was nominated for election, elected or appointed to the Board of Directors of the Company with the approval of
a majority of the Continuing Directors who were members of the Board of Directors of the Company at the time of such nomination, election or appointment (either by a specific vote or by approval by such directors of the Company’s proxy
statement in which such member was named as a nominee for election as a director). 
 “Fitch” means Fitch Ratings, Inc.,
and its successors. 
 “Investment Grade” means a rating equal to or higher than Baa3 (or the equivalent) by Moody’s, BBB- (or the equivalent) by S&P or BBB- (or the equivalent) by Fitch, and the equivalent investment grade credit rating from any replacement Rating Agency or Rating
Agencies selected by the Company. 
 “Moody’s” means Moody’s Investors Service, Inc., a subsidiary of
Moody’s Corporation, and its successors. 
 “Rating Agencies” means (a) each of Moody’s, S&P and Fitch
to the extent Fitch makes its rating available; and (b) if any of the Rating Agencies ceases to rate the Securities or fails to make a rating of the Securities publicly available for reasons outside of the Company’s control, a
“nationally recognized statistical rating organization” as such term is defined in Section 3(a)(62) of the Exchange Act that is selected by the Company (as certified by a resolution of the Board of Directors of the Company) as a
replacement for Moody’s, S&P or Fitch, or some or all of them, as the case may be. 
 “S&P” means
Standard & Poor’s Global Ratings, a division of S&P Global Inc., and its successors. 
 “Voting Stock” of
any specified person as of any date means the capital stock of such person that is at the time entitled to vote generally in the election of the board of directors of such person. 

8. Defeasance. 
 The Indenture
contains provisions for defeasance at any time of the entire indebtedness of this Security or certain covenants and Events of Default with respect to this Security, in each case upon compliance with certain conditions set forth in the Indenture.

 9. Defaults and Remedies. 

If an Event of Default with respect to the Securities shall occur and be continuing, the principal of the Securities may be declared due and
payable in the manner and with the effect provided in the Indenture. 












 As provided in and subject to the provisions of the Indenture, if any Event of Default
occurs and is continuing, the Trustee or the Holders of at least 25% in aggregate principal amount of the then Outstanding Securities may declare all the Securities to be due and payable immediately. Upon any such declaration, the entire aggregate
principal amount of, premium, if any, and accrued and unpaid interest on the Securities shall become immediately due and payable. Notwithstanding the foregoing, in the case of an Event of Default arising from certain events of bankruptcy or
insolvency with respect to the Company, all Outstanding Securities will become due and payable without further action or notice. Holders may not enforce the Indenture or the Securities except as provided in the Indenture. Subject to certain
limitations, Holders of a majority in aggregate principal amount of the then Outstanding Securities may direct the Trustee in its exercise of any trust or power. The Trustee may withhold from Holders of the Securities notice of any continuing
Default or Event of Default (except a Default or Event of Default relating to payment of principal or interest on any Security) if it determines that withholding notice is in their interest. The Holders of a majority in aggregate principal amount of
the Securities may waive any existing or past Default or Event of Default under the Indenture, and its consequences, except a default in the payment of the principal of, or interest on, the Securities. The Company is required to deliver to the
Trustee annually a statement regarding compliance with the Indenture. 
 10. Authentication. 

This Security shall not be valid until the Trustee manually signs the certificate of authentication on this Note. 

11. Abbreviations and Defined Terms. 

Customary abbreviations may be used in the name of a Holder of a Note or an assignee, such as: TEN COM (= tenants in common), TEN ENT (=
tenants by the entireties), JT TEN (= joint tenants with right of survivorship and not as tenants in common), CUST (= Custodian), and U/G/M/A (= Uniform Gifts to Minors Act). 

12. CUSIP Numbers. 
 Pursuant to
a recommendation promulgated by the Committee on Uniform Security Identification Procedures, the Company has caused CUSIP numbers to be printed on the Securities as a convenience to the Holders of the Securities. No representation is made as to the
accuracy of such numbers as printed on the Securities and reliance may be placed only on the other identification numbers printed hereon. 

13. Waiver of Liabilities 
 No
past, present or future director, officer, employee, incorporator, agent, stockholder or Affiliate of the Company or any of its Subsidiaries, as applicable, shall have any liability for any obligations of the Company or any of its Subsidiaries under
the Securities, the Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder by accepting a Security waives and releases all such liabilities. The waiver and release are part of the
consideration for issuance of the Securities. 












 14. Governing Law. 

The laws of the State of New York shall govern the Indenture and this Note thereof. 












 ASSIGNMENT FORM 

To assign this Security, fill in the form below: 
 I or we
assign and transfer this Security to: 
  
  

(Insert assignee’s social security or tax I.D. no.) 
  

 
  

 
  

 
  

 
 (Print or type assignee’s name,
address and zip code) 
 and irrevocably appoint ______________________ as agent to transfer this Security on the books of the Company. The agent may
substitute another to act for him. 
  
  

 

			
	 Your Signature:
	 	
                   
                                         
                                         
                                         
                                  

		 	(Sign exactly as your name appears on the other side of this Security)


			
		
	 Your Name:
	 	
                   
                                         
                                         
                                         
  

	
	
Date:______________________



			
		
	Signature Guarantee:	 	                                
                                         
                                         
                                         
                     

  

	*	 NOTICE: The Signature must be guaranteed by an Institution which is a member of one of the following recognized
signature Guarantee Programs: (i) The Securities Transfer Agent Medallion Program (STAMP); (ii) The New York Stock Exchange Medallion Program (MNSP); (iii) The Stock Exchange Medallion Program (SEMP); or (iv) such other guarantee program
acceptable to the Trustee. 














 [TO BE ATTACHED TO GLOBAL SECURITIES] 

SCHEDULE OF EXCHANGES OF INTERESTS IN THE GLOBAL 

SECURITY 
 The initial outstanding principal
amount of this Global Security is $            . 
 The following exchanges of an interest in
this Global Security for an interest in another Global Security or for a Definitive Security, exchanges of an interest in another Global Security or a Definitive Security for an interest in this Global Security, or exchanges or purchases of a part
of this Global Security have been made: 
  

									
	 Date of Exchange
	  	Amount of decrease in
Principal Amount of
this Global Security	  	Amount of increase in
Principal Amount of
this Global Security	  	Principal Amount of
this Global Security
following such
decrease or increase	  	Signature of authorized
signatory of Trustee or
Securities Custodian













 REPURCHASE EXERCISE NOTICE UPON A CHANGE OF CONTROL 

To:     KLA-Tencor Corporation 

The undersigned registered owner of this Security hereby acknowledges receipt of a notice from KLA-Tencor Corporation
(the “Company”) as to the occurrence of a Change of Control Triggering Event with respect to the Company and hereby directs the Company to pay, or cause the Trustee to pay,
                     an amount in cash equal to 101% of the aggregate principal amount of the Securities, or the portion thereof (which is
$2,000 principal amount or a multiple of $1,000 in excess thereof) below designated, to be repurchased plus interest accrued to, but excluding, the repurchase date, except as provided in the Indenture. 

Dated: _____________ 
 Signature ____________________ 

Principal amount to be repurchased (at least $2,000 or a multiple of $1,000 in excess thereof): _________________ 

Remaining principal amount following such repurchase: ________________ 

Tax Identification No.: 

Signature Guarantee*: 

By:                         
                                     

Authorized Signatory 
  

	*	 Participant in a recognized Signature Guarantee Medallion Program (or other signature guarantor acceptable to
the Trustee).