Durable silver coating for mirrors

Patent · Sat Jan 01 04:00:00 EST 2000

OSTI ID:873051

Wolfe, Jesse D ^[1]; Thomas, Norman L ^[2]

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1. Discovery Bay, CA
2. Livermore, CA

A durable multilayer mirror includes reflective layers of aluminum and silver and has high reflectance over a broad spectral range from ultraviolet to visible to infrared. An adhesion layer of a nickel and/or chromium alloy or nitride is deposited on an aluminum surface, and a thin layer of silver is then deposited on the adhesion layer. The silver layer is protected by a passivation layer of a nickel and/or chromium alloy or nitride and by one or more durability layers made of metal oxides and typically a first layer of metal nitride. The durability layers may include a composite silicon aluminum nitride and an oxinitride transition layer to improve bonding between nitride and oxide layers.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA
• DOE Contract Number: W-7405-ENG-48
• Assignee: Regents of University of California (Oakland, CA)
• Patent Number(s): US 6078425
• OSTI ID: 873051
• Country of Publication: United States
• Language: English

Related Subjects

/359/427/
adhesion
adhesion layer
alloy
aluminum
aluminum nitride
bonding
broad
chromium
chromium alloy
coating
composite
deposited
durability
durable
improve
improve bonding
infrared
layer
layers
metal
metal nitride
metal oxide
metal oxides
mirror
mirrors
multilayer
multilayer mirror
nickel
nitride
oxide
oxide layer
oxide layers
oxides
oxinitride
passivation
passivation layer
protected
range
reflectance
reflective
reflective layer
silicon
silver
silver layer
spectral
spectral range
surface
transition
transition layer
typically
ultraviolet
visible