| US 7,452,604 B2 | ||
| Reflective Ag alloy film for reflectors and reflector provided with the same | ||
| Katsutoshi Takagi, Kobe (Japan); Toshiki Sato, Kobe (Japan); Junichi Nakai, Kobe (Japan); and Yuuki Tauchi, Kobe (Japan) | ||
| Assigned to Kabushiki Kaisha Kobe Seiko Sho, Kobe-shi (Japan) | ||
| Filed on Jun. 21, 2004, as Appl. No. 10/871,493. | ||
| Claims priority of application No. 2003-271438 (JP), filed on Jul. 07, 2003. | ||
| Prior Publication US 2005/0008883 A1, Jan. 13, 2005 | ||
| Int. Cl. B32B 9/00 (2006.01) | ||
| U.S. Cl. 428—426 [428/432; 428/469; 428/612; 428/687; 428/698] | 21 Claims |
| 1. An automotive lamp comprising a reflective film, the reflective film comprising:
an Ag-based alloy; and
a substrate;
wherein:
the alloy comprises Pd, Pt or both Pd and Pt in a range of from 0.5 to 5.0 at %, and a rare earth element in a range of from
0.1 to 3.1 at %;
a film comprising one or more nitrides selected from the group consisting of silicon nitride, aluminum nitride, and boron
nitride is formed on the substrate as a primer layer; and
the reflective film has an average surface roughness Ra of 2.0 nm or less.
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