Product category:
Coatings and coating systems
News Release from: Deposition Sciences | Subject: Low pressure chemical vapor deposition process
Edited by the Manufacturingtalk Editorial
Team on 27 August 2007
Coating complex glass/ceramic/metal
shapes
A low pressure chemical vapor deposition can coat complex shapes in almost all types of optical glass, including ball lenses, crystalline materials, ceramics and metals.
Using the IsoDyn low pressure chemical vapor deposition process (LPCVD), Deposition Sciences (DSI) develops, manufactures and applies highly specialized, durable coatings onto complex shapes and multifaceted substrates The process can coat almost all types of optical glass, including ball lenses, crystalline materials, ceramics and metals
This article was originally published on Manufacturingtalk on 16 Jan 2008 at 8.00am (UK)
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DSI's proprietary LPCVD is a high temperature process (approximately 500 deg C) that features uniform coatings on surfaces - inside and out.
In a single-pass operation, the process deposits high performance coatings over the entire surface of an irregularly-shaped optic.
The LPCVD deposition method is a thermally driven, organo-metallic process that is configured to deposit multi-layers of silicon dioxide, tantalum oxide, and titanium dioxide, as needed.
Fully automated, DSI's process is capable of manufacturing very complex filters, providing coatings with service temperatures as high as 700 deg C.
The multi-layered coatings are resistant to thermal shock and can be deposited on optics as small as 0.3mm.
They also feature highly stable wavelengths that do not shift with temperature.
With ball lens optics, the uniformity of the coatings simplifies assembly and eliminates the need for specific orientation of the part, greatly reducing labor-intensive, device-assembly costs.
All LPCVD IsoDyn coatings from DSI meet or surpass the rigid Mil-C-675 testing standards for severe abrasion, adhesion, humidity and salt fog tests, making them ideal for a wide variety of high temperature materials.
* About Deposition Sciences - Deposition Sciences Incorporated (DSI) in Santa Rosa, California, USA has produced the most durable optical thin film filter coatings in the industry for the past 30 years.
DSI's coating capability ranges from the ultraviolet (UV), through the visible and includes near-infrared (NIR), midwave-infrared (MWIR) and out to the longwave-infrared (LWIR).
At the heart of these capabilities is DSI's patented MicroDyn reactive sputtering technology enabling superior multilayer thin film coatings for optics, MEMS and other thin film technologies.
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