EXHIBIT 99.1 
CADENCE COMPLETES MERGER WITH CCT

COMBINATION RESULTS IN IMMEDIATE SYNERGIES FOR CUSTOMERS FACING SYSTEM-CHIP 
AND HIGH-SPEED PCB CHALLENGES

SAN JOSE, Calif., May 7/PRNewswire/-- CADENCE DESIGN SYSTEMS, INC. (NYSE:CDN) 
announced that its merger transaction with Cooper & Chyan Technology, Inc. 
(CCT) (Nasdaq: CCTI-NEWS) will be consummated today in a move that 
immediately results in the industry's leading solution for the design of 
sophisticated integrated circuits and high-speed printed circuit boards.  The 
merger will address one of the most critical aspects of next-generation 
electronic product design: how the elements contained on leading edge silicon 
chips and printed circuit boards are designed and connected together.

"Given the staggering speed of innovation in silicon process technology, we 
are facing an impending productivity crisis in electronic product design" 
said Joe Costello, president and CEO of Cadence. "The powerful combination of 
intellectual capital resident in Cadence and CCT will enable us to radically 
accelerate the delivery of innovative technology solutions necessary to 
address these paramount issues."

Customers are benefiting today from the combination of complementary design 
solutions already available from Cadence and CCT. With the completion of the 
merger, the two companies can immediately focus on enhancing the 
interoperability between their respective market leading tools. "The 
technical and cultural synergies between Cadence and CCT make this a very 
solid merger that will have immediate impact on the productivity of our 
customers," said Jack Harding, former CEO of CCT, now a Cadence senior vice 
president. "I am confident that the combination of our two organizations will 
generate substantial leverage."

On Tuesday, the United States Federal Trade Commission (FTC) accepted 
Cadence's agreement to comply with a Consent Order.  The agreement calls for 
Cadence to expand its Connections Program to enable independent software 
developers to provide interfaces to Cadence's integrated circuit (IC) design 
tools. The FTC has 60 days in which to withdraw, modify or make final its 
acceptance of Cadence's agreement with the FTC, during which time the 
agreement, the proposed Consent Order and related documents will be made 
available for public comment.

Pursuant to the merger, each outstanding share of CCT common stock is being 
exchanged for .85 shares of Cadence common stock.  This results in a total 
issuance of approximately 11.4 million Cadence shares in exchange for all 
outstanding shares of CCT stock.  Cadence is also assuming CCT employee stock 
options, which are becoming options to purchase approximately 1.9 million 
shares of Cadence common stock. As a result of the merger, CCT is becoming a 
wholly-owned subsidiary of Cadence.  The merger is expected to be accounted 
for as a "pooling of interests."

This news release contains forward looking statements that involve risks and
uncertainties, including risks that the FTC might withdraw its acceptance of the
agreement with Cadence, in which case the FTC might reopen its investigation
with respect to the CCT merger; that the 


                                        




integration of the operations, technologies, products and employees of 
Cadence and CCT might not occur as anticipated; that the synergies expected 
to result from the merger might not occur as anticipated; and that 
management's attention might be diverted from day-to-day business activities. 
Actual results and developments may differ materially from those described in 
this release. For more information about Cadence and risks arising when 
investing in Cadence, refer to Cadence's most recent reports on Form 10-K and 
Form 1O-Q, and recent registration statement on Form S-4 related to the 
merger, as filed with the United States Securities and Exchange Commission.

Cadence Design Systems, Inc. provides comprehensive services and technology 
for the product development requirements of the world's leading electronics 
companies.  Cadence is the largest supplier of software tools and 
professional services used to accelerate and manage the design of 
semiconductors, computer systems, networking and telecommunications 
equipment, consumer electronics, and a variety of other electronic-based 
products.  With more than 3,500 employees and annual sales of $742 million in 
1996, Cadence has sales offices and research facilities around the world.  
The company is headquartered in San Jose, Calif. and traded on the New York 
Stock Exchange under the symbol CDN.  More information about the company can 
be obtained from the World Wide Web at HTTP://WWW.CADENCE.COM.