Electric resistance heating devices – Heating devices – Vaporizer
Patent
1996-03-12
1997-08-19
Walberg, Teresa J.
Electric resistance heating devices
Heating devices
Vaporizer
21912163, 21912165, 21912185, 131194, B23K 2602, B23K 2600, A24F 4700
Patent
active
056596561
ABSTRACT:
A method is disclosed for mechanically and electrically bonding metallic materials and semiconductor materials. The method according to the invention may be used, for example, in forming a semiconductor electrical heater, particularly for use in electrical smoking articles. A metallic element, such as a copper alloy power supply tab, is laser welded to a semiconductor element, such as a doped silicon resistive heater element. A laser beam is directed through a hole in the copper alloy tab to melt some silicon material, which flows into the hole in the copper tab, reacts and intermixes with the copper and solidifies to form a slug containing copper silicide. A protective material such as nickel may be applied to protect the copper silicide from oxidation if desired. An ohmic, low resistance contact and high strength bond is provided between the parts.
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Glenn Charles E. B.
Osborne Kevin B.
Pelham J.
Philip Morris Incorporated
Schardt James E.
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