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Home > Press > ATMI and Ovonyx Produce Electrical Performance and Endurance Data in Key Step Toward Developing Commercially Viable CVD Phase Change Material Depositi

Process and Material Expertise From ATMI, Phase Change Materials, Process and Device Architecture Know-How From Ovonyx, Enable Chemical Vapor Deposition of Dense 3-D Structures With Robust Phase Change Performance

ATMI and Ovonyx Produce Electrical Performance and Endurance Data in Key Step Toward Developing Commercially Viable CVD Phase Change Material Depositi

DANBURY, CT and ROCHESTER HILLS, MI | Posted on December 9th, 2008

ATMI, Inc. (Nasdaq:ATMI) and Ovonyx, Inc., today announced that the companies successfully demonstrated Germanium Antimony Telluride (GST) -based Phase Change Memory (PCM) devices made with Chemical Vapor Deposition (CVD) processes. These methods were scalable to sub-40 nanometers (nm), high aspect ratio, high density, and three-dimensional structures. PCM devices built with the CVD processes demonstrated endurance exceeding 10(6) write-erase cycles.

PCM devices incorporating GST materials are commercially available today, and are generally produced using traditional physical vapor deposition techniques. Working with optimized GST precursor materials from ATMI and phase change technologies from Ovonyx, the companies have now deposited GST films using more scalable CVD processes. It enables deposition into small, 3-D features and results in functional phase change devices of the size, speed, and endurance (able to operate over a million cycles without degrading) that will allow smaller cell size and more scalable application in upcoming high-performance Flash and DRAM applications.

"Today's forms of memory are fast approaching their physical limits in speed and density," said Tod Higinbotham, ATMI Executive Vice President, Process Solutions. "The ability to apply a high-volume process like CVD to this challenge enables future generation phase change memory products with greater scalability and lower cost. The strength of Ovonyx's expertise in PCM developments and the results of a collaboration announced only last March have already cracked the door open to commercial steps for this CVD approach to PCM technology."

Using ATMI's GST precursor materials, the companies achieved excellent amorphous film morphology in sub-40 nm contact-like structures with aspect ratios of up to 5:1. The ability to use CVD processing allowed Ovonyx and ATMI to deposit the GST material into the 3-D, high aspect ratio structures, which permits implementation of the highly scalable "confined cell" PCM technology. Confined cell allows fast write-times and high density packing of bits, thereby making PCM increasingly competitive compared with Flash and DRAM. The CVD-deposited GST films exhibited phase change functions with an endurance exceeding 10(6) cycles, exceeding typical flash write-erase cycle specifications.

"ATMI has supplied chemicals and process solutions to a number of leading research projects on GST-based phase change memory," said Chuck Dennison, Chief Operating Officer of Ovonyx. "Capitalizing on ATMI's experience and enabling conformal deposition processes like CVD have resulted in significant progress in efforts to demonstrate high performance CVD deposited phase change memory and to define a scalable and efficient path to future PCM products."

Ovonyx's PCM technology is an emerging non-volatile memory with expected scalability down to sub-10 nm dimensions. CVD based confined-cell technology allows the increased scaling and cost-reduction required to pursue next-generation products. ATMI's new GST precursors enable the use of mature CVD technologies for deposition into small, high aspect ratio structures consistent with confined cells.


About ATMI, Inc.
ATMI provides specialty materials and high-purity materials handling and delivery solutions to the worldwide semiconductor industry.

About Ovonyx, Inc.

Ovonyx was formed with the charter to commercialize its proprietary phase-change semiconductor memory technology originally invented at Energy Conversion Devices, Inc. Ovonyx nonvolatile PCM technology offers significantly faster write and erase speeds through its capability for byte-write in either direction (avoiding the need to erase a block to write a bit), higher cycling endurance, and better scaling performance with new generations of photolithography than conventional Flash memory. Relative to DRAM, PCM eliminates the refresh power by retaining its memory without power. PCM also has the advantage of a simple fabrication process that allows the design of semiconductor chips with embedded nonvolatile memory using only a few additional mask steps. Ovonyx is pursuing commercialization of its array-addressed memory systems through licenses and joint development programs with semiconductor manufacturers including BAE Systems, Intel Corporation, ST Microelectronics, Elpida Memory, Samsung Electronics, Qimonda AG, and Hynix Semiconductor Inc. For more information, please visit

Statements contained herein that relate to ATMI's future performance, including, without limitation, statements with respect to ATMI's anticipated results of operations or level of business for 2008 or any other future period, are forward-looking statements within the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Such statements are based on current expectations only and are subject to certain risks, uncertainties, and assumptions, including, but not limited to, changes in semiconductor industry growth (including, without limitation, wafer starts) or ATMI's markets; competition, problems, or delays developing, commercializing and delivering new products; problems or delays in integrating acquired operations and businesses; uncertainty in the credit and financial markets; and other factors described in ATMI's Form 10-K for the year ended December 31, 2007, and other subsequent filings with the Securities and Exchange Commission. Such risks and uncertainties may cause actual results to differ materially from those expressed in our forward-looking statements. ATMI undertakes no obligation to update any forward-looking statements.

ATMI and the ATMI logo are trademarks or registered trademarks of Advanced Technology Materials, Inc., in the United States, other countries or both.

For more information, please click here

ATMI, Inc.
Dean Hamilton, Director, ATMI Investor Relations & Corporate
203.794.1100 x4202

Ovonyx, Inc.
Karen Connolly, Director, Communications

Copyright © GlobeNewswire, Inc.

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