Source: https://patents.google.com/patent/US7866853
Timestamp: 2018-04-22 18:53:58
Document Index: 697725267

Matched Legal Cases: ['art\n29', 'art\n50', 'art 29', 'art 29', 'art 29', 'art 29', 'art 29']

US7866853B2 - Light-emitting element mounting substrate and manufacturing method thereof, light-emitting element module and manufacturing method thereof, display device, lighting device, and traffic light - Google Patents
Light-emitting element mounting substrate and manufacturing method thereof, light-emitting element module and manufacturing method thereof, display device, lighting device, and traffic light Download PDF
US7866853B2
US7866853B2 US12325113 US32511308A US7866853B2 US 7866853 B2 US7866853 B2 US 7866853B2 US 12325113 US12325113 US 12325113 US 32511308 A US32511308 A US 32511308A US 7866853 B2 US7866853 B2 US 7866853B2
US12325113
US20090122554A1 (en )
20, 30, 40 light-emitting element module
21, 31, 41 enameled substrate (light-emitting
element mounting substrate)
22, 32, 42 core metal
23, 33, 43 enamel layer
24, 34, 44 light-emitting element
25, 35, 45 wire bonding
26, 36, 46 sealing resin
27, 37, 47 electrode
28, 38, 48, 51, 56, 60 reflective cup
29a, 39a, 49a, 52, 57 bottom part
29b, 39b, 49b, 53, 58 sloped part
50, 54, 59 groove
With respect to the shape of the concave portion of the formed reflective cups 28, it is preferable that the shape have a flat bottom part 29 a and a sloped part 29 b with an inclination that gradually widens upwards from the circumferential edge of the bottom part 29 a.
The material of the enamel layer 23 disposed on the surface of this core metal 22 can be selected for use from among materials primarily composed of glass which are conventionally used to form enamel layers on metal surfaces. In the present invention, the thickness range of the enamel layer 23 disposed on the surface of the core metal 22 is 50 μm to 200 μm. When the thickness of the enamel layer 23 is less than 50 μm, there is a possibility of occurrence of cracking in the enamel layer at the time of baking onto the surface of the core metal 22, and so exposure of the internal metal core to the outside, resulting in occurring a decline in insulating performance as well as a decline in the long-term reliability of the substrate due to oxidation and the like of the core metal 22. When the thickness of the enamel layer 23 exceeds 200 μm, the possibility of cracking in the enamel layer likewise arises, and furthermore there is the problem that the enamel layer tends to collect at the circumferential edge of the bottom part 29 a during baking, with the result that the light-emitting element 24 is not able to be mounted on the bottom part 29 a due to a reduction in mounting space. In the present invention, by forming an enamel layer 23 with a thickness range of 50 μm to 200 μm on the surface of the core metal 22, it is possible to form a uniform enamel layer 23 which obtains excellent insulating performance and which is free of cracks. Moreover, with an enamel layer 23 of this thickness, the shape of the underlying core metal 22 can be reproduced as is, and the shapes of the reflective cups 28 formed in the core metal 22 can also be reproduced as is in the enamel layer 23.
Thickness Thickness of Thickness of
of enamel enamel at conductive layer at
on the bottom face bottom face of Presence
substrate of concave concave portions of
(μm) portions (μm) (μm) cracking
Example 1 50 52 30 none
Example 2 97 98 31 none
Example 3 210 200 28 none
Reference 30 34 30 1 place
Reference 300 320 29 5 places
Thickness Thickness of conductive
of enamel enamel at layer at Mounting of
on the bottom face of bottom face of light-
substrate concave concave portions emitting
(μm) portions (μm) (μm) element
Example 1 50 52 30 No problem
Example 2 97 98 31 No problem
Example 3 210 200 28 No problem
Reference 30 34 30 No problem
Reference 300 320 29 Mounting
example 2 could not be
US12325113 2004-11-19 2008-11-28 Light-emitting element mounting substrate and manufacturing method thereof, light-emitting element module and manufacturing method thereof, display device, lighting device, and traffic light Active 2026-08-09 US7866853B2 (en)
JP2004-336132 2004-11-19
JP2004336132A JP4037404B2 (en) 2004-11-19 2004-11-19 Emitting element mounting substrate and a manufacturing method thereof
PCT/JP2006/310897 WO2007138695A1 (en) 2006-05-31 2006-05-31 Light-emitting device mounting substrate and method for producing same, light-emitting device module and method for manufacturing same, display, illuminating device, and traffic signal system
PCT/JP2006/310897 Continuation WO2007138695A1 (en) 2006-05-31 2006-05-31 Light-emitting device mounting substrate and method for producing same, light-emitting device module and method for manufacturing same, display, illuminating device, and traffic signal system
US20090122554A1 true US20090122554A1 (en) 2009-05-14
US7866853B2 true US7866853B2 (en) 2011-01-11
ID=40623534
US12325113 Active 2026-08-09 US7866853B2 (en) 2004-11-19 2008-11-28 Light-emitting element mounting substrate and manufacturing method thereof, light-emitting element module and manufacturing method thereof, display device, lighting device, and traffic light
US (1) US7866853B2 (en)
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WO2007138695A1 (en) 2006-05-31 2007-12-06 Fujikura Ltd. Light-emitting device mounting substrate and method for producing same, light-emitting device module and method for manufacturing same, display, illuminating device, and traffic signal system
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US20090122554A1 (en) 2009-05-14 application
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:OHASHI, MASAKAZU;URUGA, KEN-ICHI;ITO, MASANORI;REEL/FRAME:022120/0827