EXHIBIT 99.1





CONTACTS:
MIKE EL-HILLOW                                  CATHY KAWAKAMI
SENIOR VICE PRESIDENT, CHIEF FINANCIAL OFFICER  DIRECTOR OF INVESTOR RELATIONS
ADVANCED ENERGY INDUSTRIES, INC.                ADVANCED ENERGY INDUSTRIES, INC.
970-407-6570                                    970-407-6732
mike.el-hillow@aei.com                          cathy.kawakami@aei.com

FOR IMMEDIATE RELEASE

               ADVANCED ENERGY REPORTS FIRST QUARTER 2002 RESULTS

FORT COLLINS, COLORADO (APRIL 17, 2002)-Advanced Energy (Nasdaq: AEIS) today
reported financial results for the first quarter ended March 31, 2002. Advanced
Energy is a leading global provider of critical components and sub-systems used
in the production of semiconductors, flat panel displays, data storage products
and other advanced applications.

For the 2002 first quarter, revenues were $42.9 million, including $6.7 million
from Aera Japan Ltd., which Advanced Energy acquired in mid January 2002. This
represents a decrease of 43 percent from $74.7 million for the first quarter of
2001, and an increase of 26 percent from $34.0 million for the fourth quarter of
2001.

Net loss for the first quarter of 2002 was $8.7 million, or $0.27 per share
compared to first quarter 2001 net income of $5.1 million, or $0.16 per diluted
share. This compares to the fourth quarter 2001 net loss of $14.4 million, or
$0.45 per share. Pro forma net loss from operations for the fourth quarter of
2001 was $9.4 million, or $0.29 per share, excluding a $2.5 million
restructuring charge related to October 2001 cost containment initiatives, a
$5.6 million charge related to a technology investment, and the related tax
effect of $3.1 million.

Doug Schatz, chairman and chief executive officer, said, "Although we remain
cautious about the current industry environment, we are pleased to report a
quarter-over-quarter improvement in our operating results. Based on current
order patterns, we expect a continued increase in demand as we move into the
second quarter of 2002."



"Throughout this downturn, Advanced Energy has been aggressive in moving forward
our strategy to bring higher value solutions to our customers. We executed this
strategy through key acquisitions and through internal development programs
where we worked closely with our customers to identify and address complex
plasma manufacturing issues. The recent acquisitions of Aera, Dressler HF
Technik GmbH and Symphony Systems add key technology solutions to our product
portfolio, and will enable Advanced Energy to address a larger available market
opportunity while bringing a more comprehensive suite of subsystems to our
customers. Our technology lead is even broader now than when we entered the
industry downturn, and we will benefit from this strong position as the industry
continues to recover," said Mr. Schatz.

The Company is continuing to experience an increase in demand, and currently
expects revenues in the $53 to $57 million range and a net loss of $0.20 to
$0.23 per share for the second quarter of 2002.

FIRST QUARTER 2002 CONFERENCE CALL

Management will host a conference call today, Wednesday, April 17, 2002 at 9:00
am Eastern time to discuss the financial results. You may access this conference
call by dialing 888-713-4717. International callers may access the call by
dialing 706-679-7720. For a replay of this teleconference, please call
706-645-9291, code 3610221. The replay will be available through Wednesday,
April 24, 2002. There will also be a webcast available at
www.advanced-energy.com.

ABOUT ADVANCED ENERGY

Advanced Energy is a global leader in the development, marketing and support of
components and sub-systems critical to plasma-based manufacturing processes used
in the production of semiconductors, flat panel displays, data storage products,
compact discs, digital video discs, architectural glass, and other applications
that require precise thin-film processes.

AE offers a comprehensive line of technology solutions in power, flow and
thermal management, plasma and ion beam sources, and integrated process
monitoring and control to original equipment manufacturers (OEMs) and end-users
around the world.

AE operates in regional centers in North America, Asia and Europe, and offers
global sales and support through direct offices, representatives and
distributors. Founded in 1981, AE is a publicly-held company traded on Nasdaq
National Market under the symbol AEIS. For more information, please visit our
corporate website: www.advanced-energy.com.



SAFE HARBOR STATEMENT

This press release contains certain forward-looking statements subject to known
and unknown risks and uncertainties that could cause actual results to differ
materially from those expressed or implied by such statements. Such risks and
uncertainties include, but are not limited to: the volatility and cyclicality of
the semiconductor and semiconductor capital equipment industries, fluctuations
in quarterly and annual revenues and operating results, Advanced Energy's
ongoing ability to develop new products in a highly competitive industry
characterized by increasingly rapid technological changes, our ability to
successfully integrate acquired companies' operations, and other risks described
in Advanced Energy's Form 10-K, Forms 10-Q and other reports and statements, as
filed with the Securities and Exchange Commission. These reports and statements
are available on the SEC's website at www.sec.gov. Copies may also be obtained
by contacting Advanced Energy's investor relations at 970-407-6732. The company
assumes no obligation to update the information in this press release.




CONDENSED CONSOLIDATED INCOME STATEMENT (UNAUDITED)
(IN THOUSANDS EXCEPT PER SHARE DATA)




                                                                    Quarter Ended March 31,
                                                                   -------------------------
                                                                     2002             2001
                                                                   --------         --------
                                                                              
Sales                                                              $ 42,887         $ 74,714
Cost of sales                                                        29,513           43,491
                                                                   --------         --------
Gross profit                                                         13,374           31,223

Operating expenses:
     Research and development                                        11,248           12,389
     Sales and marketing                                              6,751            6,629
     General and administrative                                       6,798            6,174
     Litigation recovery                                               --             (1,500)
                                                                   --------         --------
(Loss) income from operations                                       (11,423)           7,531

Other (expense) income                                               (1,997)             187
                                                                   --------         --------

Net (loss) income before income taxes and minority interest         (13,420)           7,718

(Benefit) provision for income taxes                                 (4,697)           2,689
Minority interest in net loss                                          --                (65)
                                                                   --------         --------

Net (loss) income                                                  $ (8,723)        $  5,094
                                                                   ========         ========

Net (loss) earnings per share:
  Basic                                                            $  (0.27)        $   0.16
  Diluted                                                          $  (0.27)        $   0.16

Basic weighted-average common shares outstanding                     31,874           31,547
                                                                   --------         --------

Diluted weighted-average common shares outstanding                   31,874           32,187
                                                                   --------         --------




CONDENSED CONSOLIDATED INCOME STATEMENT (UNAUDITED)
OTHER INFORMATION
(IN THOUSANDS EXCEPT PER SHARE DATA)




                                                                              Quarter Ended March 31,
                                                                             -------------------------
                                                                               2002             2001
                                                                             --------         --------
                                                                                        
ADDITIONAL INFORMATION - PRO FORMA WITHOUT EXCEPTIONAL ITEMS:
Pro forma net (loss) income without exceptional items                        $ (8,723)        $  4,119
                                                                             --------         --------

Pro forma basic (loss) earnings per share                                    $  (0.27)        $   0.13
Pro forma diluted (loss) earnings per share                                  $  (0.27)        $   0.13


ADDITIONAL INFORMATION - EBITDA:
(Loss) earnings before interest, taxes, depreciation and amortization        $ (7,170)        $ 11,219
                                                                             --------         --------

Pretax EBITDA diluted EPS                                                    $  (0.22)        $   0.35
After tax EBITDA diluted EPS                                                 $  (0.15)        $   0.23



THE PRO FORMA AMOUNTS HAVE BEEN ADJUSTED TO ELIMINATE THE FOLLOWING:
Litigation recovery                                                              --             (1,500)
Income tax effect                                                                --                525
                                                                             --------         --------
                                                                             $   --           $   (975)
                                                                             ========         ========

EBITDA RECONCILIATION
(Loss) income before income taxes and minority interest                       (13,420)           7,718
Interest income                                                                  (940)          (1,769)
Interest expense                                                                3,298            1,288
Depreciation and amortization                                                   3,892            3,982
                                                                             --------         --------
                                                                             $ (7,170)        $ 11,219
                                                                             ========         ========




CONDENSED CONSOLIDATED BALANCE SHEET (UNAUDITED)
(IN THOUSANDS)




                                                                       March 31,     December 31,
                                                                         2002            2001
                                                                       ---------     ------------
                                                                               
ASSETS

Current Assets:
     Cash and cash equivalents                                         $ 43,801        $ 81,955
     Marketable securities                                              160,996         190,023
     Accounts receivable                                                 44,858          30,812
     Income tax receivable                                               15,910          15,862
     Inventories                                                         67,016          45,248
     Other current assets                                                 3,651           4,178
     Deferred income tax assets, net                                     11,290          11,200
                                                                       --------        --------
Total current assets                                                    347,522         379,278

Property and equipment, net                                              44,179          31,095

Deposits and other                                                        8,357           6,482
Goodwill and intangibles, net                                            69,447          23,072
Demonstration and customer service equipment                              4,481           4,532
Deferred debt issuance costs                                              5,401           5,736
                                                                       --------        --------
Total assets                                                           $479,387        $450,195
                                                                       ========        ========


LIABILITIES AND STOCKHOLDERS' EQUITY

Current Liabilities:
     Trade accounts payable                                            $ 16,213        $ 10,231
     Other current liabilities                                           18,632          14,778
     Current portion of long-term debt                                    9,977           1,130
     Accrued interest payable on convertible subordinated notes           2,167           2,696
                                                                       --------        --------
Total current liabilities                                                46,989          28,835

Long-term Liabilities:
    Senior borrowings                                                    18,544            --
    Capital leases                                                        1,055            --
    Convertible subordinated notes payable                              206,600         206,600
    Deferred income tax liability, net                                      434             415
                                                                       --------        --------
Total long-term liabilities                                             226,633         207,015

Total liabilities                                                       273,622         235,850

Stockholders' equity                                                    205,765         214,345
                                                                       --------        --------
Total liabilities and stockholders' equity                             $479,387        $450,195
                                                                       ========        ========




CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS (UNAUDITED)
(IN THOUSANDS)




                                                          Three Months Ended March 31,
                                                          ----------------------------
                                                             2002             2001
                                                           --------         --------
                                                                      
NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES        $ (8,889)        $  5,581

NET CASH USED IN INVESTING ACTIVITIES                       (26,505)          (8,560)

NET CASH USED IN FINANCING ACTIVITIES                        (2,641)            (185)

EFFECT OF CURRENCY TRANSLATION ON CASH                         (119)          (1,779)
                                                           --------         --------
DECREASE IN CASH AND CASH EQUIVALENTS                       (38,154)          (4,943)
CASH AND EQUIVALENTS, beginning of period                    81,955           31,716
                                                           --------         --------
CASH AND EQUIVALENTS, end of period                        $ 43,801         $ 26,773
                                                           ========         ========




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