Exhibit 4.3

  
Specimen form of certificate representing 
Common Stock of Amtech Systems, Inc.

	
  
NUMBER
  	
  
 
  	
  
SHARES
  
	
  
 
  	
  
 
  	
  
 
  
	
  
AS
  	
   
 	
  
 
  
	
  
_______________________
  	
  
 
  	
   
_______________________
   
	
  
 
  	
  
AMTECH   SYSTEMS, INC.
  	
  
 
  
	
  
 
  	
  
INCORPORATED UNDER THE   LAWS OF THE STATE OF ARIZONA
  	
  
 
  
	
   
  	
   
 	
  
CUSIP
  
	
  
 
  	
   
 	
   
_______________________
    
	
  
 
  	
   
 	
  
SEE   REVERSE
   FOR CERTAIN DEFINITIONS
  




THIS CERTIFIES THAT


Is The Owner of


FULLY PAID AND NON-ASSESSABLE SHARES OF THE $.01 PAR VALUE COMMON STOCK OF


AMTECH SYSTEMS, INC.


transferable on the books of the Corporation by the holder hereby, in person or by duly authorized attorney, upon surrender of this certificate properly endorsed or accompanied by a proper assignment.  This certificate and the shares represented hereby are issued and shall be subject to all the provisions of the Articles of Incorporation and the Bylaws of the Corporation, and all amendments thereto, copies of which are on file a t the principal office of the corporation and the Transfer Agent, to all of which the holder of this Certificate by acceptance hereof assents.  This Certificate is not valid unless countersigned by the Transfer Agent.


          IN WITNESS WHEREOF, the Corporation has caused the facsimile signatures of its duly authorized officers and its facsimile seal to be hereunto affixed.


          Dated:





	
  
 
  	
  
 
  	
   
 	
  
Amtech Systems, Inc.
   Corporate Seal 1981 * Arizona
  	
   
 	
  
 
  
	
  
 
  	
  


  	
   
 	
   
 	
  


  
	
  
 
  	
  
Secretary
  	
   
 	
   
 	
  
President
  








	
  
 
  	
  
COUNTERSIGNED by:
  
	
  
 
  	
  
COMPUTERSHARE TRUST   COMPANY, INC. - DENVER
  
	
  
 
  	
  
TRANSFER AGENT AND   REGISTRAR
  










AMTECH SYSTEMS, INC.


TRANSFER FEE:   $15.00 PER NEW CERTIFICATE ISSUED


          The following abbreviations when used in the inscription on the face of this certificate shall be construed as though they were written out in full according to applicable laws or regulations:

	
  
TEN COM
  	
  
-as tenants in common
  	
  
 
  	
  
UNIF GIFT MIN ACT-____Custodial_____
  
	
  TEN ENT
  	
  
-as tenants by the entireties
  	
  
 
  	
  
                             _____(Cust)_____(Minor)
  
	
  
JT TEN
  	
  
-as joint tenants with right of
  	
  
 
  	
  
                  Under   Uniform Gifts to Minors
  
	
  
 
  	
  
  survivorship and not as tenants
  	
  
 
  	
  
                  Act_________________________
  
	
  
 
  	
  
  in common
  	
  
 
  	
  
                                         (State)
  





	
  
Additional   abbreviations may also be used though not in the above list.
  
	
  
___________________________________________________________________________________________________________
  
	
  
 
  
	
  
For Value Received, ____________________________________________   hereby sell, assign and   transfer unto
  





	
  
PLEASE INSERT SOCIAL   SECURITY OR OTHER
   IDENTIFYING NUMBER OF ASSIGNEE
  	
  
 
  
	
  
 
  	
  
 
  
	
  
___________________________________________
 	
  
 
  
	
  
 
  	
  
 
  






	
  
 
  
	
  
___________________________________________________________________________________________________________
  
	
  
(PLEASE   PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING SIP CODE, OF ASSIGNEE)
  
	
   
 
	
  
___________________________________________________________________________________________________________
  
	
   
 
	
  
___________________________________________________________________________________________________________
  
	
  
 
  
	
  
___________________________________________________________________________________________________________
  
	
  
Shares of the Common Stock   represented by the within Certificate, and do hereby irrevocably constitute   and appoint
  
	
  
 
  
	
  
___________________________________________________________________________________________________________
  
	
  
attorney-in-fact to   transfer the said stock on the books of the within-named Corporation, with   full power of substitution in the premises.
  





	
  
Dated
  	
  
 
  	
  
 
  
	
  
 
  	
  
_______________________________
  	
  
 
  





	
  
 
  	
  
__________________________________________________________________________
  
	
  
 
  	
  
 
  	
  
 
  
	
  
 
  	
  
__________________________________________________________________________
  
	
   
  	
  NOTICE: 
  	
  THE SIGNATURE(S) TO THIS   ASSIGNMENT MUST CORRESPOND WITH THE NAME(S) AS WRITTEN UPON THE FACE OF THE   CERTIFICATE IN EVERY PARTICULAR WITHOUT ALTERATION OR ENLARGEMENT OR ANY   CHANGE WHATSOEVER
  





	
  Signature(s) Guaranteed.
  	
   
  
	
   
  	
   
  
	
  ____________________________________________________
  	
   
  



The signature(s) should be guaranteed
by an eligible guarantor institution (Banks, Stockbrokers, Savings and Loan
Associations and Credit Unions with membership in an approved signature
guarantee Medallion Program), pursuant to S.E.C. Rule 17Ad-15.


This certificate also evidences and entitles the holder hereof to certain Rights as set forth in the Rights Agreement,
dated as of May 17, 1999 (the “Rights Agreement”), between Amtech Systems, Inc. and American Securities Transfer & Trust,
Inc., as Rights Agent, the terms of which are hereby incorporated herein by reference and a copy of which is on file at the
principal offices of Amtech Systems, Inc. Under certain circumstances, as set forth in the Rights Agreement, such Rights
will be evidenced by separate certificates and will no longer be evidenced by this certificate. Amtech Systems, Inc. will
mail to the holder of this certificate a copy of the Rights Agreement, as in effect on the date of mailing, without charge
promptly after receipt of a written request therefor. Under certain circumstances set forth in the Rights Agreement, Rights
issued to, or held by, any Person who is, was or becomes an Acquiring Person or any Affiliate or Associate thereof (as such
terms are defined in the Rights Agreement), whether currently held by or on behalf of such Person or by any subsequent
holder, may become null and void.