Method for attaching an optical fiber to a substrate to form an

Details Method for attaching an optical fiber to a substrate to form an Method for attaching an optical fiber to a substrate to form an

1986-07-28

1987-10-27

Godici, Nicholas P.

Metal fusion bonding

Process

Critical work component, temperature, or pressure

228121, 228198, G02B 636

Patent

active

047025476

ABSTRACT:
A new and efficient method for attaching an optical fiber to a substrate to form a structurally secure optical fiber package is disclosed. The method first involves coating an optical fiber with an external layer of gold. A silicon retaining member is then provided having a groove therein sized to retain and receive the coated optical fiber. The silicon retaining member and optical fiber are then positioned on a substrate preferably constructed of alumina. Deposited on the substrate is at least one metal pad having an external gold layer on which the silicon retaining member is placed. The optical fiber, silicon retaining member, and substrate are then heated at a temperature sufficient to form a silicon/gold eutectic alloy between th silicon of the retaining member and the gold layers of the optical fiber and pad. Such heating involves a temperature of at least 370.degree. C. Heating is preferably accomplished using a resistor secured to the underside of the substrate. The resulting package is characterized by improved strength, durability, and structural integrity.

REFERENCES:
patent: 3316628 (1967-05-01), Lang, Jr.
patent: 3432913 (1969-03-01), Bronnes et al.
patent: 4357072 (1982-11-01), Goodfellow et al.
patent: 4662962 (1987-05-01), Malavieille

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