Source: https://patents.google.com/patent/US7212713?oq=645576
Timestamp: 2018-03-17 17:26:54
Document Index: 477349567

Matched Legal Cases: ['art 150', 'art 150', 'art 150', 'art 150', 'art 150', 'art 150', 'art 950', 'art 960']

US7212713B2 - Optical transmission substrate, method for manufacturing optical transmission substrate and optoelectronic integrated circuit - Google Patents
US7212713B2
US7212713B2 US10977170 US97717004A US7212713B2 US 7212713 B2 US7212713 B2 US 7212713B2 US 10977170 US10977170 US 10977170 US 97717004 A US97717004 A US 97717004A US 7212713 B2 US7212713 B2 US 7212713B2
US10977170
US20050117833A1 (en )
(Nonpatent Document 1)B. J. Offrein et. al., “Tunable WDM Add/Drop Components in Silicon Oxynitride Waveguide Technology”, 49th Electronic Components & Technology Conference 1999 Proceedings, p. 19–25
(Nonpatent Document 2)Mikami, Uchida, “Development in Optical Surface-Mount Technology”, IEICE (Institute of Electronics, Information and Communication Engineers) Transactions C Vol. J84-C, p. 715–726, 2001
(Nonpatent Document 3)Ishii, Arai, “Wide Tolerance ‘Optical Bump’ Interface for Chip-Level Optical Interconnection”, IEICE (Institute of Electronics, Information and Communication Engineers) Transactions C Vol. J84-C, p. 793–799, 2001
(Nonpatent Document 4)Maruno, “Polymer Optical Waveguide Device”, IEICE (Institute of Electronics, Information and Communication Engineers) Transactions C Vol. J84-C, p. 1–6, 2001
(Nonpatent Document 5)R. F. Cregan et. al., “Single-Mode Photonic Band Gap Guidance of Light in Air”, Science, Vol. 285, p. 1537–1539, 1999
FIGS. 2( a)–2(c) are first views showing a method for manufacturing the optical transmission substrate 10 according to this embodiment. FIG. 2( a) shows a lower clad layer formation step and FIGS. 2( b) and (c) show a side and an upper surface of the optical transmission substrate 10, respectively, in a reflection part formation step.
FIGS. 3( a)–3(c) are second views showing the method for manufacturing the optical transmission substrate 10 according to this embodiment. FIG. 3( a) shows a state where a photoresist is formed in the reflection part formation step, FIG. 3( b) shows a state where an evaporated metal film 310 is evaporated and FIG. 3( c) shows a state where the evaporated metal film 310 is lifted off.
FIGS. 4( a)–4(c) are third views showing the method for manufacturing the optical transmission substrate 10 according to this embodiment. FIGS. 4( a) and 4(b) show the side and the upper surface of the optical transmission substrate 10, respectively, in a core formation step and FIG. 4( c) shows a metal film formation step.
FIGS. 5( a)–5(c) are fourth views showing the method for manufacturing the optical transmission substrate 10 according to this embodiment. FIG. 5( a) shows an upper clad layer formation step, FIG. 5( b) shows a substrate lamination step and FIG. 5( c) shows an opening formation step.
FIGS. 6( a)–6(b) are fifth views showing the method for manufacturing the optical transmission substrate 10 according to this embodiment. FIG. 6( a) shows a metal film removal step and FIG. 6( b) shows a light guide installation step.
FIGS. 7( a)–7(c) are first views showing a method for manufacturing an optical transmission substrate 10 according to a first modified example of this embodiment. FIG. 7( a) shows a step of providing a reflection part 150 in the reflection part formation step and FIGS. 7( b) and 7(c) show a step of forming a tilted portion 155.
FIGS. 8( a)–8(c) are second views showing the method for manufacturing the optical transmission substrate 10 according to the first modified example of this embodiment. FIG. 8( a) shows a step of forming a reflection surface 160, FIG. 8( b) shows a step of removing a part of the reflection part 150, FIG. 8( c) shows a step of forming an optical waveguide 130 and FIG. 8( d) shows the metal film formation step and the substrate lamination step.
FIGS. 9( a)–9(d) are third views showing the method for manufacturing the optical transmission substrate 10 according to the first modified example of this embodiment. FIG. 9( a) shows the substrate lamination step, FIG. 9( b) shows the opening formation step, FIG. 9( c) shows the metal film removal step and FIG. 9( d) shows the light guide installation step.
The optical transmission substrate 10 includes the first substrate 100, the optical waveguide 130, the second substrate 140, a reflection part 150 and the optical fiber 170. The first substrate 100 may be a printed circuit board such as a glass epoxy (FR4) substrate having electric interconnect provided thereon or may be a multilayer printed circuit board. In addition, the first substrate 100 may also adopt a configuration in which SLC (Surface Laminate Circuit) built-up substrates are laminated. The optical waveguide 130 includes a core 110 through which light passes and clad 120 (120 a and 120 b) which coats a periphery of the core 110. The optical waveguide 130 extends on an upper surface of the first substrate 100. In this embodiment, the core 110 of the optical waveguide 130 is formed to have a shape of, for example, a 50×50 μm square pole, which has an upper surface parallel to the first and second substrates 100 and 140, for the purpose of facilitating formation of the core 110 and increasing a contact area with the optical fiber 170. The second substrate 140 is provided parallel to the first substrate 100 so as to have its lower surface contact an upper surface of the optical waveguide 130. The second substrate 140 may adopt a structure similar to that of the first substrate 100.
Alternatively, a structure, in which the clad 120 b above the core 110 at the end of the optical waveguide 130 is thinner than the clad 120 b above the core 110 in a center portion of the optical waveguide 130, may be adopted. In this case, the optical fiber 170 receives the light, which is reflected toward the second substrate 140, through the thin clad 120 b in a position closer to the core 110 of the optical waveguide 130 than the upper surface of the clad 120 b.
Next, FIGS. 2( b) and 2(c) show the side and the upper surface of the optical transmission substrate 10. As shown in FIGS. 2( b) and 2(c), in a reflection part formation step, the reflection part 150 is formed on an upper surface of the lower clad layer. Specifically, the reflection part 150 has a tilted portion 155 for providing the reflection surface 160 reflecting light, which travels through the core 110 of the optical waveguide 130, toward the second substrate 140. In this embodiment, a cross section of the reflection part 150 is a 50×50 μm square, which is the same thickness as that of the core 110 of the optical waveguide 130.
The optical transmission substrate 10 includes the first substrate 100, the optical waveguide 130, the second substrate 140, the reflection surfaces 160 a and 160 b and the optical fibers 170 a and 170 b. The first substrate 100 may adopt a configuration similar to that of the first substrate 100 shown in FIG. 1. The optical waveguide 130 includes clads 120 a and 120 b covering the core 110 and the periphery of the core 110 and extends on the upper surface of the first substrate 100. The second substrate 140 is provided parallel to the first substrate 100 so that the lower surface thereof contacts the upper surface of the optical waveguide 130. The optical fiber 170 a is provided in the second substrate 140 and guides the optical signal, which is inputted from the light emitting part 950, to a position closer to the core 110 than the upper surface of the clad 120 b. The reflection surface 160 a is provided on a cross section of the core 110 at a first end of the optical waveguide 130. The reflection surface 160 a reflects the optical signal guided from the upper surface of the second substrate 140 by the optical fiber 170 a and transmits the optical signal through the core 110 of the optical waveguide 130. The reflection surface 160 b is provided on a cross section of the core 110 at a second end of the optical waveguide 130 and reflects the optical signal, which travels through the core 110 of the optical waveguide 130, toward the second substrate 140. The optical fiber 170 b is provided in the second substrate 140 and guides the optical signal reflected toward the second substrate 140 to the light receiving part 960 from the position closer to the core 110 than the upper surface of the clad 120 b.
US10977170 2003-11-27 2004-10-29 Optical transmission substrate, method for manufacturing optical transmission substrate and optoelectronic integrated circuit Active 2025-05-26 US7212713B2 (en)
JP2003397920A JP3887371B2 (en) 2003-11-27 2003-11-27 Light transmission substrate, the optical transmission substrate manufacturing method, and optoelectronic integrated circuits
JP2003-397920 2003-11-27
US11679460 US7421858B2 (en) 2003-11-27 2007-02-27 Optical transmission substrate, method for manufacturing optical transmission substrate and optoelectronic integrated circuit
US20050117833A1 true US20050117833A1 (en) 2005-06-02
US7212713B2 true US7212713B2 (en) 2007-05-01
ID=34616550
US10977170 Active 2025-05-26 US7212713B2 (en) 2003-11-27 2004-10-29 Optical transmission substrate, method for manufacturing optical transmission substrate and optoelectronic integrated circuit
US11679460 Active US7421858B2 (en) 2003-11-27 2007-02-27 Optical transmission substrate, method for manufacturing optical transmission substrate and optoelectronic integrated circuit
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JP (1) JP3887371B2 (en)
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Cregan et al., "Single Mode Photonic Band Gap Guidance of Light in Air", Science, vol. 285, Sep. 3, 1999, pp. 1537-1539.
Ishii et al., "Large-Tolerant OptoBump Interface For Interchip Optical Interconnections" vol. J84-C, No. 9, 2001, pp. 793-799. (No English Translation).
Mikami et al., "Development of Optical Surface Mount Technology", vol. J84-C, No. 9, 2001, pp. 715-726. (No English Translation).
Offrein et al., "Tunable WDM Add/Drop Components in Silicon-Oxynitride Waveguide Technology", Electronic Components and Technology Conference, 1999, pp. 19-25.
T. Maruno, "Polymer Optical Waveguide Devices", Technical Report of IEICE, 1999, pp. 1-6.
US7421858B2 (en) 2008-09-09 grant
JP2005157128A (en) 2005-06-16 application
JP3887371B2 (en) 2007-02-28 grant
US20070137254A1 (en) 2007-06-21 application
US20050117833A1 (en) 2005-06-02 application
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:FUKUZAWA, TADASHI;HASEGAWA, MASAKI;REEL/FRAME:015941/0841;SIGNING DATES FROM 20041014 TO 20041015