Dual titanium nitride layers for solar control
First Claim
1. A solar control member comprising:
- a substantially transparent substrate;
a first titanium nitride layer having a fixed position relative to said substrate; and
a second titanium nitride layer having a fixed position relative to said first titanium nitride layer and being on a same side of said substrate as said first titanium nitride layer, said first and second titanium nitride layers being spaced apart by a distance of at least 700 nm to provide optical decoupling with respect to constructive and destructive interference of visible light propagating therebetween;
wherein said first and second titanium nitride layers cooperate to provide a higher transmission of visible light than near infrared light.
7 Assignments
0 Petitions
Accused Products
Abstract
A solar control member utilizes a combination of layers that include spaced apart titanium nitride layers to selectively transmit a higher percentage of visible light than near infrared energy, with a low visible light reflection. The titanium nitride layers are spaced apart by a distance that promotes optical decoupling with respect to occurrence of constructive and destructive interference of visible light propagating between the two titanium nitride layers. In one embodiment, the titanium nitride layers are spaced apart by a laminating adhesive layer. In another embodiment, the titanium nitride layers are formed on opposite sides of a substrate. The ratio of transmission at the wavelength of 550 nm to transmission at the wavelength of 1500 is at least 1.25. Each titanium nitride layer is sputter deposited. Care is taken to ensure that each layer does not become too metallic and to ensure that excessive oxygen is not incorporated into the layer. Thus, the nitrogen flow rate and the linespeed are controlled. Sputtering occurs at a fast rate using high powers and a minimum acceptable nitrogen flow, while minimizing background contamination.
37 Citations
18 Claims
-
1. A solar control member comprising:
-
a substantially transparent substrate;
a first titanium nitride layer having a fixed position relative to said substrate; and
a second titanium nitride layer having a fixed position relative to said first titanium nitride layer and being on a same side of said substrate as said first titanium nitride layer, said first and second titanium nitride layers being spaced apart by a distance of at least 700 nm to provide optical decoupling with respect to constructive and destructive interference of visible light propagating therebetween;
wherein said first and second titanium nitride layers cooperate to provide a higher transmission of visible light than near infrared light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A solar control member comprising:
-
a first transparent substrate;
a first layer of titanium nitride on said first substrate;
a second transparent substrate;
a second layer of titanium nitride on said second substrate; and
an optically massive bonding layer joining said first and second layers, thereby forming an assembly in which said first and second layers are sandwiched between said first and second substrates, said first and second layers being spaced apart by a distance that provides optical decoupling with respect to constructive and destructive interference of visible light propagating therebetween, said first and second layers being cooperative to provide a higher transmission of visible light than near infrared light. - View Dependent Claims (14, 15, 16, 17)
-
-
18. A solar control member comprising:
-
a substantially transparent substrate, said substrate being a flexible member having a first side for attachment to a transparent member through which solar protection is of interest;
a first titanium nitride layer formed on said first side of said substrate;
a second titanium nitride layer formed on a second side of said substrate, said first and second titanium nitride layers being spaced apart by a distance that provides optical decoupling with respect to constructive and destructive interference of visible light propagating therebetween; and
a hardcoat layer and a low surface energy layer at said second side of said substrate and opposite to said second titanium nitride layer to provide protection for an exposed surface when said substrate is attached to said transparent member through which solar protection is of interest;
wherein said first and second titanium nitride layers cooperate to provide a higher transmission of visible light than near infrared light.
-
Specification