Close

Search

Search Menu
Photonics Media Photonics Buyers' Guide Photonics Spectra BioPhotonics EuroPhotonics Vision Spectra Photonics Showcase Photonics ProdSpec Photonics Handbook
More News

Low-Pressure Chemical Vapor Deposition (LPCVD)

Deposition Sciences Inc. (DSI)Request Info
 
Facebook Twitter LinkedIn Email Comments
Low-Pressure Chemical Vapor Deposition (LPCVD)DSI created a form of low-pressure chemical vapor deposition (LPCVD) called IsoDyn specifically to address the production of thin films on highly curved optics. These can be difficult or impossible to manufacture using other methods.

In the IsoDyn process, the coating material is created through the chemical reaction of a precursor gas within the coating chamber, rather than from a source consisting of the material itself. Specifically, parts to be coated are put into an evacuated chamber and heated to about 500°C. The chamber is then filled with a chemical vapor at relatively high (usually 0.1 Torr to 5.0 Torr) pressure. The heat causes a chemical reaction in the precursor gas, resulting in deposition of the desired substance on all exposed surfaces of the substrate. This process is repeated with various precursors to produce a multilayer coating.

Because of the gas pressure, the mean free path for molecules is very short, meaning that deposition occurs at the same rate on every surface within the chamber, regardless of its position or orientation. This makes IsoDyn technology particularly useful for producing highly uniform coatings on parts with unusual shapes or steep curvatures.

Since the deposition rate is uniform throughout the chamber, there is no need to physically move the parts during coating, unlike other coating methods, greatly simplifying the type of tooling needed to hold the parts. In fact, DSI employs proprietary technology that yields “tool marks,” that is, areas which are not coated, that are virtually negligible (as small as 0.5 µm).

The high temperature used in the IsoDyn process also gives rise to extraordinarily durable coatings. The overall result is coatings that can survive repeated handling and abrasion, and that perform well over very large temperature and humidity ranges. It also results in excellent laser damage threshold characteristics.


Photonics Buyers' Guide
REQUEST INFO ABOUT THIS PRODUCT

* Message:
(requirements, questions for supplier)
Your contact information
* First Name:
* Last Name:
* Email Address:
* Company:
Address:
Address 2:
City:
State/Province:
Postal Code:
* Country:
Phone #:
Fax #:

Register or login to auto-populate this form:
Login Register
* Required

When you click "Send Request", we will record and send your personal contact information to Deposition Sciences Inc. (DSI) by email so they may respond directly. You also agree that Photonics Media may contact you with information related to this inquiry, and that you have read and accept our Privacy Policy and Terms and Conditions of Use.
coatingsDeposition SciencesProductsanti-reflective coatingschemical vapor depositionIsoDynLPCVDball Lensdomerod lens

back to top
Facebook Twitter Instagram LinkedIn YouTube RSS
©2019 Photonics Media, 100 West St., Pittsfield, MA, 01201 USA, info@photonics.com

Photonics Media, Laurin Publishing
x We deliver – right to your inbox. Subscribe FREE to our newsletters.
X
Are you interested in this product?
When you click "Send Request", we will send the contact details you supply to Deposition Sciences Inc. (DSI) so they may respond to your inquiry directly.

Email Address:
Name:
Company:
Stop showing me this for the remainder of my visit
We use cookies to improve user experience and analyze our website traffic as stated in our Privacy Policy. By using this website, you agree to the use of cookies unless you have disabled them.