US5818990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Encapsulation of optoelectronic components
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1995-03-20
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Granted: 1998-10-06
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Expires: 2015-03-20
Abstract
Abstract An encapsulated optocomponent (1) comprises a single-crystal silicon wafer (3) and waveguides (9) located thereon, which at least partly are manufactured by means of process methods taken from the methods for manufacturing electronic integrated circuits. The waveguides (9) extend from an edge of the optoelectronic component (1) to an optoelectronic, active or passive component (11) attached to the surface of the silicon wafer (3). Over the region for connecting the waveguides (9) to the optoelectronic component (11) a transparent plastics material is molded (17), for instance an elastomer, having a refractive index adjusted to improve the optical coupling between the waveguides (9) and the optoelectronic component (11). The molding (17) covers advantageously all of said component (11) to also reduce thermal stresses between it and an exterior, protective layer (19) of a curable plastics material. The molded layer (17) can also cover the whole area of the waveguides (9) to form an upper cladding thereof. Guide grooves (5) are arranged in the silicon wafer (3) for positioning guide pins (7), utilized in the connection of the optocomponent (1) to another optocomponent having guides for guide pins and waveguides configured in the same way.
Inventors
- 👤 Odd Steijer
- 👤 Paul Eriksen
- 👤 Hans Moll
- 👤 Jan Åke Engstrand
- 👤 Goran Palmskog
- 👤 Mats Janson
- 👤 Pia Tinghag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:28
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/42; G02B6/4201; G02B6/4251; G02B6/4253; G02B6/4255; G02B6/4256; G02B6/4257
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
153 words
A method for the manufacture of an optocomponent, comprising the steps of: producing a plate of an inorganic material, producing at least portions of waveguides at a surface of the plate, mounting an optoelectronic component on said surface of the plate for an optical coupling to the waveguides and for connection to electrical terminals, coating at least a portion of the surface of the plate including at least a portion of a free surface of the waveguide portions and a free surface of the optoelectronic component with a first plastics material, applying on top of at least an area of the plate covered with the first plastics material a layer of a second plastics material wherein the second plastics material has a high mechanical resistance to form a protection of the optoelectronic component and the waveguides and the first plastics material has a high elasticity to relieve mechanical stresses resulting from temperature changes.
Claim 2
Independent Claim
153 words
A method for the manufacture of an optocomponent, comprising the steps of: producing a plate of an inorganic material, producing at least portions of waveguides at a surface of the plate, mounting an optoelectronic component on said surface of the plate for an optical coupling to the waveguides and for connection to electrical terminals, coating at least a portion of the surface of the plate including at least a portion of a free surface of the waveguide portions and a free surface of the optoelectronic component with a first plastics material, applying on top of at least an area of the plate covered with the first plastics material a layer of a second plastics material wherein the second plastics material has a high mechanical resistance to form a protection of the optoelectronic component and the waveguides and the first plastics material has a high elasticity to relieve mechanical stresses resulting from temperature changes.
Claim 3
Dependent Claim
56 words
A method according to claim 1, wherein the first plastics material is also coated over a region at one end of the waveguides where the waveguides are coupled to the optoelectronic component, and the first plastics material is a transparent material having a refracting index to enhance the optical coupling between the component and the waveguide.
Claim 4
Dependent Claim
42 words
A method according to claim 1, wherein the first plastics material is first coated on top of waveguide portions and the first plastics material is a transparent material having an adapted refractive index to form an upper cladding portion of the waveguides.
Claim 5
Independent Claim
183 words
A method for the manufacture of an optocomponent, comprising the steps of: producing a plate of an inorganic material, producing at least one cladding and at least one core associated said cladding at a surface of the plate for obtaining at least one waveguide, and mounting an optoelectronic component on said surface of the plate for optical coupling to the waveguides and for connection to electrical terminals, wherein a lower part of said at least one cladding and said at least one core are first produced by process technological methods at a top of a surface of the plate, an upper portion of the at least one cladding is produced by covering at least a portion of the surface of the plate including at least a portion of a free surface of the at least one lower cladding and at least a portion of a free surface of the at least one core with a plastics material, and wherein at least said surface of the plate including free surfaces of the cladding and the plastics material is coated with an additional plastics layer.
Claim 6
Independent Claim
183 words
A method for the manufacture of an optocomponent, comprising the steps of: producing a plate of an inorganic material, producing at least one cladding and at least one core associated said cladding at a surface of the plate for obtaining at least one waveguide, and mounting an optoelectronic component on said surface of the plate for optical coupling to the waveguides and for connection to electrical terminals, wherein a lower part of said at least one cladding and said at least one core are first produced by process technological methods at a top of a surface of the plate, an upper portion of the at least one cladding is produced by covering at least a portion of the surface of the plate including at least a portion of a free surface of the at least one lower cladding and at least a portion of a free surface of the at least one core with a plastics material, and wherein at least said surface of the plate including free surfaces of the cladding and the plastics material is coated with an additional plastics layer.
Claim 7
Dependent Claim
90 words
A method according to claim 4, wherein for producing at least one waveguide a lower portion of cladding is first produced by coating at least one layer by process technological methods over a selected region on a surface of the plate, as at least one elongated and strip shaped region and subsequently producing at least one core by process technological methods by coating an additional layer having an elongated shape at a surface of the at least one layer which forms the lower portion of the at least one cladding.
Claim 8
Dependent Claim
26 words
A method according to claim 4, wherein at least a connection region between the component and at least one waveguide is coated with a plastics material.
Claim 9
Dependent Claim
32 words
A method according to claim 6, wherein the plastics material is a transparent material having a refractive index for enhancing the optical coupling between the component and the at least one waveguide.
Claim 10
Independent Claim
124 words
A method for the manufacture of an optocomponent comprising an optical connector means, comprising the steps of: producing a plate of an inorganic material, producing at least one waveguide at a surface of the plate, mounting an optoelectronic component on the surface of the plate for an optical coupling to the waveguides, producing accurately aligned guide grooves in the surface of the plate, coating at least a connection region between the component and at least one waveguide by molding thereon a transparent material having a selected refractive index to enhance the optical coupling between the component and the at least one waveguide, and molding on top of at least an area of the plate where the transparent material is coated a protective plastics layer.
Claim 11
Independent Claim
124 words
A method for the manufacture of an optocomponent comprising an optical connector means, comprising the steps of: producing a plate of an inorganic material, producing at least one waveguide at a surface of the plate, mounting an optoelectronic component on the surface of the plate for an optical coupling to the waveguides, producing accurately aligned guide grooves in the surface of the plate, coating at least a connection region between the component and at least one waveguide by molding thereon a transparent material having a selected refractive index to enhance the optical coupling between the component and the at least one waveguide, and molding on top of at least an area of the plate where the transparent material is coated a protective plastics layer.
Claim 12
Dependent Claim
23 words
A method according to claim 8, wherein a plate of single-crystal silicon is produced and wherein the guide grooves are formed by etching.
Claim 13
Dependent Claim
29 words
A method according to claim 8, wherein a plate of single-crystal silicon is produced and wherein at least one waveguide at least partly is produced by process technological methods.
Claim 14
Dependent Claim
47 words
A method according to claim 8, wherein at least one of the step of producing the guide grooves and the the step of producing the at least one waveguide includes producing at least one projection on the plate surface for an accurate positioning of the optoelectronic component.
Claim 15
Dependent Claim
27 words
A method according to claim 11, wherein a plate of single-crystal silicon is produced and wherein the at least one projection is produced by process technological methods.
Claim 16
Dependent Claim
47 words
A method according to claim 8, further comprising the step of disposing alignment devices in the guide grooves for connecting optical contact means to corresponding optical contact means having at least partly the same shape in the guide grooves before the step of molding the plastics layer.
Claim 17
Dependent Claim
22 words
A method according to claim 8, wherein at least one waveguide is produced by placing an optical fiber in a guide groove.
Claim 18
Dependent Claim
160 words
An encapsulated optocomponent, comprising: a substrate of an inorganic material, an optoelectronic component mounted to a surface of the substrate optical coupling between the waveguides and for connection to electrical terminals, waveguides at least partly formed in and/or on the surface of the substrate, wherein the optoelectric component is optically coupled to the waveguides, a first plastics layer of an elastomer material covering at least a portion of the surface of the substrate including at least a portion of a free surface of the waveguides and a free surface of the optoelectronic component and a second plastics layer covering at least all of the first plastics layer on the surface of the substrate, wherein the material of the second plastics material has a high mechanical resistance to form a protection of the optoelectronic component and the waveguides and the material of the first plastics material is soft and has a high elasticity to relieve mechanical stresses resulting from temperature changes.
Claim 19
Dependent Claim
160 words
An encapsulated optocomponent, comprising: a substrate of an inorganic material, an optoelectronic component mounted to a surface of the substrate optical coupling between the waveguides and for connection to electrical terminals, waveguides at least partly formed in and/or on the surface of the substrate, wherein the optoelectric component is optically coupled to the waveguides, a first plastics layer of an elastomer material covering at least a portion of the surface of the substrate including at least a portion of a free surface of the waveguides and a free surface of the optoelectronic component and a second plastics layer covering at least all of the first plastics layer on the surface of the substrate, wherein the material of the second plastics material has a high mechanical resistance to form a protection of the optoelectronic component and the waveguides and the material of the first plastics material is soft and has a high elasticity to relieve mechanical stresses resulting from temperature changes.
Claim 20
Independent Claim
205 words
A method for the manufacture of an optocomponent, comprising the steps of: producing a plate of an inorganic material, producing at least one cladding and at least one core associated said cladding at a surface of the plate for obtaining at least one waveguide, and mounting an optoelectronic component on said surface of the plate for optical coupling to the waveguides and for connection to electrical terminals, wherein a lower part of said at least one cladding and said at least one core are first produced by process technological methods at a top of a surface of the plate, wherein an upper portion of the at least one cladding is produced by covering at least a portion of the surface of the plate including at least a portion of a free surface of the at least one lower cladding and at least a portion of a free surface of the at least one core with a plastics material, wherein at least a connection region between the component and at least one waveguide is coated with a plastics material, and wherein the plastics material is a transparent material having a refractive index for enhancing the optical coupling between the component and the at least one waveguide.
Claim 21
Independent Claim
205 words
A method for the manufacture of an optocomponent, comprising the steps of: producing a plate of an inorganic material, producing at least one cladding and at least one core associated said cladding at a surface of the plate for obtaining at least one waveguide, and mounting an optoelectronic component on said surface of the plate for optical coupling to the waveguides and for connection to electrical terminals, wherein a lower part of said at least one cladding and said at least one core are first produced by process technological methods at a top of a surface of the plate, wherein an upper portion of the at least one cladding is produced by covering at least a portion of the surface of the plate including at least a portion of a free surface of the at least one lower cladding and at least a portion of a free surface of the at least one core with a plastics material, wherein at least a connection region between the component and at least one waveguide is coated with a plastics material, and wherein the plastics material is a transparent material having a refractive index for enhancing the optical coupling between the component and the at least one waveguide.
Claim 22
Dependent Claim
90 words
A method according to claim 16, wherein for producing at least one waveguide a lower portion of cladding is first produced by coating at least one layer by process technological methods over a selected region on a surface of the plate, as at least one elongated and strip shaped region and subsequently producing at least one core by process technological methods by coating an additional layer having an elongated shape at a surface of the at least one layer which forms the lower portion of the at least one cladding.
Claim 23
Dependent Claim
34 words
A method according to claim 16, further comprising the step of coating at least said surface of the plate including free surfaces of the cladding and the plastics material with an additional plastics layer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-10-05 | 2002-04-06 | 2002-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-10-05 | 2006-04-06 | 2006-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-10-05 | 2010-04-06 | 2010-10-06 | $7700.00 | Window Closed / Lapsed |