UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 8-K

CURRENT REPORT
Pursuant to section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported)                 January 29, 2009           

ZYGO CORPORATION

(Exact Name of Registrant as Specified in its Charter)           

Delaware	0-12944	06-0864500
(State or Other Jurisdiction	(Commission	(IRS Employer
of Incorporation)	File Number)	Identification No.)
Laurel Brook Road, Middlefield, CT		06455-0448
(Address of Principal Executive Offices)		(Zip Code)

Registrant’s telephone number, including area code:                 (860) 347-8506           

Not Applicable

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2 below):

[X] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

[X] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

[ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

[ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13-4(c))

ITEM 2.02. RESULTS OF OPERATIONS AND FINANCIAL CONDITION.

On January 29, 2009, Zygo Corporation announced its fiscal 2009 Quarter 2 results. The full text of the press release issued in connection with the announcement is attached as Exhibit 99.1 to this Current Report on Form 8-K.

ITEM 8.01. OTHER EVENTS.

The eighth, ninth and tenth paragraphs of the press release attached as Exhibit 99.1 to this Current Report on Form 8-K, concerning Zygo Corporation’s initially contemplated merger with Electro Scientific Industries, Inc., are hereby incorporated by reference as if set forth in full under this Item 8.01.

ITEM 9.01. FINANCIAL STATEMENTS AND EXHIBITS.

(d) Exhibits

99.1     Press Release, dated January 29, 2009, issued by Zygo Corporation which announced its fiscal 2009 Quarter 2 results.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	ZYGO CORPORATION
Date: January 29, 2009	By:	/s/ Walter A. Shephard
		Name: Walter A. Shephard
		Title: Vice President Finance, CFO,
		and Treasurer

EXHIBIT INDEX

99.1     Press Release, dated January 29, 2009, issued by Zygo Corporation which announced its fiscal 2009 Quarter 2 results.