Exhibit 99.1

FOR RELEASE ON APRIL 29, 2005

                                                      Contact: Paul Nolan, CFO
                                                               Nanometrics, Inc.
                                                               408.435.9600 x122


NANOMETRICS ANNOUNCES RECORD SALES FOR THE FIRST QUARTER OF 2005

Milpitas,  California,  April 29, 2005 - Nanometrics Incorporated (NASDAQ: NANO)
today reported financial results for the first quarter ended April 2, 2005.

Total revenues for the first quarter of 2005 were $23.5 million,  an increase of
14% from  $20.6  million in the fourth  quarter of 2004 and an  increase  of 72%
compared to $13.7 million for the first  quarter of 2004.  The increase in first
quarter  revenues in 2005  compared to the first  quarter of 2004  resulted from
stronger  demand for its  metrology  equipment  used for  semiconductor  process
control,  particularly in the U.S. and Pacific Rim countries.  Net income in the
first quarter of 2005 was $2.6 million or $0.19 per diluted share, compared to a
net loss of $1.2  million  or a loss of $0.10  per  diluted  share  for the same
period last year.

General and administrative expenses for the first quarter of 2005 were higher by
$0.7 million than in the first  quarter of 2004  primarily as a result of higher
regulatory  compliance  expenses in 2005.  Service costs were also higher in the
quarter as  headcount,  installations  and  shipments  increased.  The Company's
financial position  continues to be strong with cash and short-term  investments
totaling $31.1 million.

About  Nanometrics:  Nanometrics  Incorporated is a leading supplier of advanced
integrated  and  standalone   metrology  equipment  used  in  the  semiconductor
industry.  The  Company's  corporate  office is located at 1550  Buckeye  Drive,
Milpitas,  CA 95035,  with sales and service offices  worldwide.  Nanometrics is
traded  on   NASDAQ   under   the   symbol   NANO.   Nanometrics'   website   is
http://www.nanometrics.com.  An earnings  conference  call will be held on April
29, 2005 at 8:00 A.M.  Pacific Time. To participate  in the earnings  conference
call, the dial-in numbers are  800-706-7749 in the United States or 617-614-3474
for international calls. The passcode is 86651487.






                                                      NANOMETRICS INCORPORATED
                                                     CONSOLIDATED BALANCE SHEETS
                                             (Amounts in thousands except share amounts)


                                                                                                   April 2,
                                                                                                     2005                 January 1,
                                                                                                  (Unaudited)               2005
                                                                                                   --------               --------
                                                                                                                    
ASSETS
CURRENT ASSETS:
   Cash and cash equivalents                                                                       $ 12,296               $ 15,949
   Short-term investments                                                                            18,852                 17,919
   Accounts receivable, net of allowances
     of $598 and $603                                                                                27,598                 22,222
   Inventories                                                                                       25,422                 25,494
   Prepaid expenses and other                                                                         2,669                    944
                                                                                                   --------               --------
      Total current assets                                                                           86,837                 82,528

PROPERTY, PLANT AND EQUIPMENT, NET                                                                   48,245                 49,035
INTANGIBLE ASSETS                                                                                       848                    924
OTHER ASSETS                                                                                          1,464                  1,282
                                                                                                   --------               --------
       TOTAL                                                                                       $137,394               $133,769
                                                                                                   ========               ========

LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES:
   Accounts payable                                                                                $  3,275               $  3,146
   Accrued payroll and related expenses                                                               2,326                  2,206
   Deferred revenue                                                                                   4,256                  2,742
   Other current liabilities                                                                          2,564                  1,840
   Income taxes payable                                                                               1,346                  1,515
   Current portion of debt obligations                                                                  792                  1,164
                                                                                                   --------               --------
         Total current liabilities                                                                   14,559                 12,613

DEFERRED INCOME TAXES AND
       OTHER LONG-TERM LIABILITIES                                                                      354                    930
DEBT OBLIGATIONS                                                                                      1,851                  2,070
                                                                                                   --------               --------
         Total liabilities                                                                           16,764                 15,613
                                                                                                   --------               --------

SHAREHOLDERS' EQUITY:
   Common stock, no par value;
     50,000,000 shares authorized;
     12,584,877 and 12,566,636 outstanding                                                          104,323                104,191
    Retained earnings                                                                                14,636                 12,034
   Accumulated other comprehensive income                                                             1,671                  1,931
                                                                                                   --------               --------
         Total shareholders' equity                                                                 120,630                118,156
                                                                                                   --------               --------
       TOTAL                                                                                       $137,394               $133,769
                                                                                                   ========               ========






                            NANOMETRICS INCORPORATED
                      CONSOLIDATED STATEMENTS OF OPERATIONS
                 (Amounts in thousands except per share amounts)
                                   (Unaudited)


                                                          Three Months Ended
                                                       -------------------------
                                                       April 2,         April 3,
                                                         2005            2004
                                                       --------        --------

NET REVENUES:
   Product sales                                       $ 21,166        $ 11,663
   Service                                                2,325           2,008
                                                       --------        --------
   Total net revenues                                    23,491          13,671
                                                       --------        --------

COSTS AND EXPENSES:
   Cost of product sales                                  9,750           5,403
   Cost of service                                        2,573           1,611
   Research and development                               3,179           3,489
   Selling                                                3,145           3,066
   General and administrative                             1,998           1,295
                                                       --------        --------

   Total costs and expenses                              20,645          14,864
                                                       --------        --------

INCOME (LOSS) FROM OPERATIONS                             2,846          (1,193)
                                                       --------        --------

OTHER INCOME (EXPENSE):
   Interest income                                          130              56
   Interest expense                                         (18)            (29)
   Other, net                                              (270)             (3)
                                                       --------        --------

Total other income (expense), net                          (158)             24
                                                       --------        --------

INCOME (LOSS) BEFORE INCOME TAXES                         2,688          (1,169)

PROVISION FOR INCOME TAXES                                  (83)            (43)
                                                       --------        --------

NET INCOME (LOSS)                                      $  2,605        $ (1,212)
                                                       ========        ========


NET INCOME (LOSS) PER SHARE:
   Basic                                               $   0.21        $  (0.10)
                                                       ========        ========
   Diluted                                             $   0.19        $  (0.10)
                                                       ========        ========


SHARES USED IN PER SHARE COMPUTATION:
   Basic                                                 12,575          12,189
                                                       ========        ========
   Diluted                                               13,455          12,189
                                                       ========        ========