Method for producing lamp filaments of increased radiative effic

Details Method for producing lamp filaments of increased radiative effic Method for producing lamp filaments of increased radiative effic

1991-01-22

1992-10-06

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156643, 156654, 1566611, 156904, 21912169, 427111, 445 48, B44C 122, C03C 1500, C23F 102, B05D 512

Patent

active

051528703

ABSTRACT:
A method for fabricating incandescent lamp filaments having surface features of submicron-to-micron sized cross sections which increase the radiative efficiency of the filament comprises depositing at least one enveloping mask layer on the filament and cutting a selected pattern into the filament by ablation with a beam of radiated energy. The desired surface features are formed on the filament by a process that includes stenciling through the selected pattern.

REFERENCES:
Craighead, H. G., Howard, R. E. and Tennant, D. M., "Selectively Emissive Refractory Metal Surface", Applied Physics Letters, Jan. 1981, vol. 38, No. 2, pp. 74-76.
Waymouth, J. F., "Where Will the Next Generation of Lamps Come From?", Fifth International Symposium on the Science and Technology of all Light Sources, York, England, Sep. 10-14, 1989, pp. 21-26 and FIG. 20.

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