US5414787A — Coupling structure between optical semiconductor …

Claim 1

Independent Claim 195 words

A structure for optically coupling an optical semiconductor and an optical waveguide having a core which propagates light while confining said light, said structure comprising: said optical semiconductor mounted on a surface of a first substrate; a short optical fiber received in a groove formed in said first substrate and positioned such that a core of said short optical fiber is located at a same height, as measured from said surface of said first substrate, as a light emitting portion of said optical semiconductor; and said optical waveguide formed on a second substrate and having a terminating end portion on a surface of said second substrate, said terminating end having a mirror-finished end; said second substrate comprising a groove formed in said surface thereof on an imaginary extension of said core of said optical waveguide, part of said short optical fiber which rises above said surface of said first substrate being received in said groove of said second substrate; the height of said core of said short optical fiber being the same as a height of said core of said optical waveguide, whereby said optical semiconductor and said optical waveguide are coupled to each other.

Claim 2

Dependent Claim 195 words

A structure for optically coupling an optical semiconductor and an optical waveguide having a core which propagates light while confining said light, said structure comprising: said optical semiconductor mounted on a surface of a first substrate; a short optical fiber received in a groove formed in said first substrate and positioned such that a core of said short optical fiber is located at a same height, as measured from said surface of said first substrate, as a light emitting portion of said optical semiconductor; and said optical waveguide formed on a second substrate and having a terminating end portion on a surface of said second substrate, said terminating end having a mirror-finished end; said second substrate comprising a groove formed in said surface thereof on an imaginary extension of said core of said optical waveguide, part of said short optical fiber which rises above said surface of said first substrate being received in said groove of said second substrate; the height of said core of said short optical fiber being the same as a height of said core of said optical waveguide, whereby said optical semiconductor and said optical waveguide are coupled to each other.

Claim 3

Dependent Claim 93 words

A structure as claimed in claim 1, further comprising: a first thin film opaque for infrared rays and formed in part of a surface of said optical semiconductor which contacts said first substrate; and a second thin film opaque for infrared rays and formed in entire or part of a region of said surface of said first substrate other than a region which faces said first thin film; a first figure and a second figure respectively formed by contours defined by boundaries of said first and second thin films being coincident in position.

Claim 4

Dependent Claim 31 words

A structure as claimed in claim 2, wherein said optical semiconductor and said optical waveguide are optically coupled when areal centers of gravity of said first and second figures are coincident.

Claim 5

Dependent Claim 51 words

A structure as claimed in claim 3, wherein said first and second figures are provided in a plurality of pairs, said optical semiconductor and said optical waveguide being optically coupled when the areal centers of gravity of said first and second figures are coincident all of said in plurality of pairs.

Claim 6

Independent Claim 167 words

A method of optically coupling an optical semiconductor and an optical waveguide having a core which propagates light while confining said light, said method comprising the steps of: disposing a short optical fiber in a groove formed in a first substrate such that a core of said short optical fiber is located at a same height, as measured from a surface of said first substrate, as a light emitting portion of said optical semiconductor mounted on said surface of said first substrate; disposing part of said short optical fiber rising above said surface of said first substrate in a groove formed in a second substrate on an imaginary extension of said core of said optical waveguide which is formed on a surface of a second substrate, said optical waveguide comprising a terminating end portion having a mirror-finished end: and coupling said optical semiconductor and said optical waveguide while positioning said core of said short optical fiber and said core of said optical waveguide at a same height.

Claim 7

Independent Claim 167 words

A method of optically coupling an optical semiconductor and an optical waveguide having a core which propagates light while confining said light, said method comprising the steps of: disposing a short optical fiber in a groove formed in a first substrate such that a core of said short optical fiber is located at a same height, as measured from a surface of said first substrate, as a light emitting portion of said optical semiconductor mounted on said surface of said first substrate; disposing part of said short optical fiber rising above said surface of said first substrate in a groove formed in a second substrate on an imaginary extension of said core of said optical waveguide which is formed on a surface of a second substrate, said optical waveguide comprising a terminating end portion having a mirror-finished end: and coupling said optical semiconductor and said optical waveguide while positioning said core of said short optical fiber and said core of said optical waveguide at a same height.

Claim 8

Dependent Claim 110 words

A method as claimed in claim 5, further comprising the steps of: detecting a first figure formed by a contour defined by a boundary of a first thin film which is opaque for infrared rays and is formed in part of a surface of said optical semiconductor which contacts said first substrate, and a second figure formed by a contour defined by a boundary of a second thin film opaque for infrared rays and formed in entire or part of a region of said surface of said first substrate other than a region which faces said first thin film: and positioning and mounting said optical semiconductor to said first substrate.

Claim 9

Dependent Claim 41 words

A method as claimed in claim 6, further comprising the steps of: radiating infrared rays from above said optical semiconductor; detecting light reflected from said first and second thin films; and positioning and mounting said optical semiconductor to said first substrate.

Claim 10

Dependent Claim 45 words

A method as claimed in claim 6, further comprising the steps of: radiating infrared rays from above said optical semiconductor; detecting light transmitted through regions where said first and second thin films are absent; and positioning and mounting said optical semiconductor to said first substrate.

Claim 11

Dependent Claim 54 words

A method as claimed in claim 6, further comprising the steps of: radiating infrared rays from a surface of said first substrate opposite to said surface to which said optical semiconductor is mounted: detecting light reflected from said first and second thin films; and positioning and mounting said optical semiconductor to said first substrate.

Claim 12

Dependent Claim 58 words

A method as claimed in claim 6, further comprising the steps of: radiating infrared rays from a surface of said first substrate opposite to said surface to which said optical semiconductor is mounted; detecting light transmitted through regions where said first and second thin films are absent; and positioning and mounting said optical semiconductor to said first substrate.

Claim 13

Dependent Claim 88 words

A method as claimed in claim 6, further comprising the steps of: detecting said first and second thin films configured such that said optical semiconductor and said optical waveguide are coupled when said first and second figures have areal centers of gravity thereof aligning with each other; calculating the areal centers of gravity of said first and second figures; moving said optical semiconductor until the areal centers of gravity of said first and second figures align with each other; and affixing said optical semiconductor to said first substrate.

Claim 14

Dependent Claim 100 words

A method as claimed in claim 7, further comprising the steps of: detecting said first and second thin films configured such that said optical semiconductor and said optical waveguide are optically coupled when said first and second figures, provided in a plurality of pairs, have the areal centers of gravity thereof aligning in all of said plurality of pairs; calculating the areal centers of gravity of said first and second figures; moving said optical semiconductor until the areal centers of gravity of said first and second figures align with each other; and affixing said optical semiconductor to said first substrate.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1998-05-08	1998-11-07	1999-05-09	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2002-05-08	2002-11-07	2003-05-09	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2006-05-08	2006-11-07	2007-05-09	$7700.00	Window Closed / Lapsed

Coupling structure between optical semiconductor and optical waveguide, and coupling method of the same

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