Patent ID: 6090481
Filing Date: 2000-07-18
Classification: B32B,C03C,C23C,G02B,Y10T

Abstract:
A coated sheet for use in a laminated assembly and having a high level of luminous transmission and a low energy transmission, comprising:a transparent substrate carrying a coating comprised of two metal layers formed of silver or silver alloy and three layers of a transparent dielectric non-absorbent material, in the sequence, from the substrate: non-absorbent 1/metal 1/non-absorbent 2/metal 2/non-absorbent 3,wherein, as part of at least one of the three layers of transparent dielectric non-absorbent material, a thin layer of sacrificial material having a total optical thickness which does not exceed 15 nm is provided above and in contact with each of the two metal layers,wherein the two metal layers have a total geometrical thickness which ranges from 16.5 to 22 nm,wherein the non-absorbent 1 layer has an optical thickness which ranges from 50 to 56 nm,wherein the three layers of a transparent dielectric non-absorbent have a total optical thickness which ranges from 220 to 260 nm, andwherein the coated sheet has a thickness ratio non-absorbent 2:nonabsorbent 1 which ranges from 2.1:1 to 2.8:1.