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US 6,054,188 AGranted
Non-ideal barrier coating architecture and process for applying the same to plastic substrates
AssigneeBecton, Dickinson and Company
InventorsYelena G. Tropsha, David A. Martin, Kevin D. Mar, Jane C. Graper, Jamshed B. Ghandhi
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Abstract
The present invention is a non-ideal barrier coating composition and the method for applying the coating composition to substrates. The non-ideal barrier coating is useful for providing an effective barrier against gas permeability in containers and for extending shelf-life of containers, especially plastic evacuated blood collection devices.
Claims14
A method for depositing onto a substrate a non-ideal barrier coating sequence comprising an inorganic material and organic materials comprising the steps of:
- (a) providing a vacuum tight chamber, means for delivering a monomer gas to said chamber, means for delivering an oxidizer gas to said chamber, means for applying radio frequency power to said chamber, means for creating and maintaining a vacuum inside said chamber and electrodes;
- (b) positioning said substrate in said chamber;
- (c) evacuating said chamber to below 50 mTorr;
- (d) delivering a first monomer gas to said chamber;
- (e) delivering an oxidizer gas to said chamber;
- (f) delivering a first radio frequency electrical current to said electrodes;
- (g) depositing an inorganic material on said substrate;
- (h) evacuating said chamber to below 50 mTorr;
- (i) delivering a second monomer gas to said chamber;
- (j) delivering a second radio frequency electrical current to said electrodes;
- (k) depositing an organic material on said inorganic material;
- and
- (l) repeating steps (c)-(f) above;
- and
- (m) depositing an inorganic material on said organic material.
12 more elements
Dependencies are inferred from the claim text.