Source: http://www.google.com/patents/US7976186?dq=7,003,515
Timestamp: 2016-07-28 13:23:54
Document Index: 734799974

Matched Legal Cases: ['Application No. 03794564', 'Application No. 04795871', 'Application No. 1', 'Application No. 04795871', 'Application No. 09171045', 'Application No. 09171045', 'Application No. 092123988', 'Application No. 2004', 'Application No. 2006', 'Application No. 2004', 'Application No. 092123988', 'Application No. 2004800309433', 'Application No. 2006', 'Application No. 04795871']

Patent US7976186 - Power surface mount light emitting die package - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA light emitting die package includes a substrate, a reflector plate, and a lens. The substrate has traces for connecting an external electrical power source to a light emitting diode (LED) at a mounting pad. The reflector plate is coupled to the substrate and substantially surrounds the mounting pad,...http://www.google.com/patents/US7976186?utm_source=gb-gplus-sharePatent US7976186 - Power surface mount light emitting die packageAdvanced Patent SearchPublication numberUS7976186 B2Publication typeGrantApplication numberUS 12/856,320Publication dateJul 12, 2011Priority dateMay 27, 2003Fee statusPaidAlso published asUS7659551, US7775685, US8167463, US8608349, US8622582, US20070138497, US20070181901, US20100301372, US20110186895, US20110186896, US20110186897Publication number12856320, 856320, US 7976186 B2, US 7976186B2, US-B2-7976186, US7976186 B2, US7976186B2InventorsBan P. LohOriginal AssigneeCree, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (125), Non-Patent Citations (69), Referenced by (24), Classifications (15), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetPower surface mount light emitting die package
US 7976186 B2Abstract
A light emitting die package includes a substrate, a reflector plate, and a lens. The substrate has traces for connecting an external electrical power source to a light emitting diode (LED) at a mounting pad. The reflector plate is coupled to the substrate and substantially surrounds the mounting pad, and includes a reflective surface to direct light from the LED in a desired direction. The lens is free to move relative to the reflector plate and is capable of being raised or lowered by the encapsulant that wets and adheres to it and is placed at an optimal distance from the LED chip(s). Heat generated by the LED during operation is drawn away from the LED by both the substrate (acting as a bottom heat sink) and the reflector plate (acting as a top heat sink).
1. A semiconductor die package, comprising:
a light emitting diode (LED) mounted on the substrate via a mounting pad so that the LED is electrically connected to a top surface of the substrate,
a reflector plate coupled to the substrate and substantially surrounding the mounting pad and LED, the reflector plate having an opening there through,
a lens placed in the opening to substantially cover the mounting pad, LED and opening, and
an encapsulant covering the LED within at least part of the opening, wherein the lens adheres to the encapsulant so that the lens floats on the encapsulant within the opening.
2. The semiconductor die package of claim 1, wherein the reflector plate further defines a reflection surface.
3. The semiconductor die package of claim 1, wherein the reflector plate and substrate serve as corresponding top and bottom heat sinks for removing heat away from the LED during package operation.
a substrate having a top surface and a bottom surface, a portion of the top surface defining a mounting pad;
a plurality of conductive traces on the top surface of said substrate, said conductive traces extending from the mounting pad to a side edge of said substrate and said conductive traces comprising electrically conductive material;
a reflector attached to the top surface of said substrate, said reflector surrounding the mounting pad while leaving other portions of the top surface of said substrate and portions of the conductive traces exposed, said reflector partially defining an optical cavity;
at least one photonic device attached to at least one conductive trace at the mounting pad; and
a heat sink coupled to the bottom surface of said substrate. Description
This application is a divisional of and claims priority benefits to U.S. patent application Ser. No. 11/703,721, filed Feb. 8, 2007 now U.S. Pat. No. 7,775,685, which is a divisional of application Ser. No. 10/446,532, filed May 27, 2003 now U.S. Pat. No. 7,264,378, the entire contents of which are both hereby incorporated by reference herein.
Example embodiments in general relate to packaging semiconductor devices which include light emitting diodes.
Another disadvantage of conventional leadframe design is that the thick lead cannot be made or stamped into a fine circuit for flip-chip mounting of a LED—which is commonly used by some manufacturers for cost-effective manufacturing and device performance.
An example embodiment of the present invention is directed to a semiconductor die package including a substrate having conductive traces on a top surface thereof, and a light emitting diode (LED) mounted to the top surface of the substrate via a mounting pad. The mounting pad is electrically connected to the conductive traces on the substrate top surface. The package includes a reflector plate mechanically coupled to the substrate and substantially surrounding the mounting pad and LED, the reflector plate defining a reflection surface, and a lens substantially covering the mounting pad and LED.
Another example embodiment is directed to a semiconductor die package having a substrate, a light emitting diode (LED) mounted on the substrate via a mounting pad so that the LED is electrically connected to a top surface of the substrate, and a reflector plate coupled to the substrate and substantially surrounding the mounting pad and LED. The reflector plate has an opening there through. A lens is placed in the opening to substantially cover the mounting pad, LED and opening. The package includes an encapsulant covering the LED within at least part of the opening. The lens adheres to the encapsulant so that the lens floats on the encapsulant within the opening.
Example embodiments will now be described with reference to the FIGS. 1 through 6D. As illustrated in the Figures, the sizes of layers or regions are exaggerated for illustrative purposes and, thus, are provided to illustrate the general structures of the present invention. Furthermore, various aspects in the example embodiments are described with reference to a layer or structure being formed on a substrate or other layer or structure. As will be appreciated by those of skill in the art, references to a layer being formed “on” another layer or substrate contemplates that additional layers may intervene. References to a layer being formed on another layer or substrate without an intervening layer are described herein as being formed “directly on” the layer or substrate.
Furthermore, relative terms such as beneath may be used herein to describe one layer or regions relationship to another layer or region as illustrated in the Figures. It will be understood that these terms are intended to encompass different orientations of the device in addition to the orientation depicted in the Figures. For example, if the device in the Figures is turned over, layers or regions described as “beneath” other layers or regions would now be oriented “above” these other layers or regions. The term “beneath” is intended to encompass both above and beneath in this situation. Like numbers refer to like elements throughout.
As shown in the figures for the purposes of illustration, example embodiments of the present invention are exemplified by a light emitting die package including a bottom heat sink (substrate) having traces for connecting to a light emitting diode at a mounting pad and atop heat sink (reflector plate) substantially surrounding the mounting pad. A lens covers the mounting pad. In effect, an example die package comprises a two part heat sink with the bottom heat sink utilized (in addition to its utility for drawing and dissipating heat) as the substrate on which the LED is mounted and connected, and with the top heat sink utilized (in addition to its utility for drawing and dissipating heat) as a reflector plate to direct light produced by the LED. Because both the bottom and the top heat sinks draw heat away from the LED, more power can be delivered to the LED, and the LED can thereby produce more light.
Further, the body of the die package itself may act as the heat sink removing heat from the LED and dissipating it. For this reason, the example LED die package may not require separate heat sink slugs or leads that extend away from the package. Accordingly, the LED die package may be more compact, more reliable, and less costly to manufacture than die packages of the prior art.
The bottom heat sink 20 is illustrated in more detail in FIGS. 2A through 2D. FIGS. 2A, 2B, 2C, and 2D provide, respectively, a top view, a side view, a front view, and a bottom view of the bottom heat sink 20 of FIG. 1A. Further, FIG. 2C also shows an LED assembly 60 in addition to the front view of the bottom heat sink 20. The LED assembly 60 is also illustrated in FIG. 1B. Referring to FIGS. 1A through 2D, the bottom heat sink 20 provides support for electrical traces 22 and 24; for solder pads 26, 32, and 34; and for the LED assembly 60. For this reason, the bottom heat sink 20 is also referred to as a substrate 20. In the Figures, to avoid clutter, only representative solder pads 26, 32, and 34 are indicated with reference numbers. The traces 22 and 24 and the solder pads 32, 34, and 36 can be fabricated using conductive material. Further, additional traces and connections can be fabricated on the top, side, or bottom of the substrate 20, or layered within the substrate 20. The traces 22 and 24, the solder pads 32, 34, and 36, and any other connections can be interconnected to each other in any combination using known methods, for example via holes.
The substrate 20 is made of material having high thermal conductivity but is electrically insulating, for example, aluminum nitride (AIN) or alumina (Al.sub.2O.sub.3). Dimensions of the substrate 20 can vary widely depending on application and processes used to manufacture the die package 10. For example, in the illustrated embodiment, the substrate 20 may have dimensions ranging from fractions of millimeters (mm) to tens of millimeters. Although the present invention is not limited to particular dimensions, one specific embodiment of the die package 10 of the present invention is illustrated in Figures with the dimensions denoted therein. All dimensions shown in the Figures are in millimeters (for lengths, widths, heights, and radii) and degrees (for angles) except as otherwise designated in the Figures, in the Specification herein, or both.
The substrate 20 has a top surface 21, the top surface 21 including the electrical traces 22 and 24. The traces 22 and 24 provide electrical connections from the solder pads (for example top solder pads 26) to a mounting pad 28. The top solder pads 26 are portions of the traces 22 and 24 generally proximal to sides of the substrate 20. The top solder pads 26 are electrically connected to side solder pads 32. The mounting pad 28 is a portion of the top surface (including portions of the trace 22, the trace 24, or both) where the LED assembly 60 is mounted. Typically the mounting pad 28 is generally located proximal to center of the top surface 21. In alternative embodiments of the present invention, the LED assembly 60 can be replaced by other semiconductor circuits or chips.
The traces 22 and 24 provide electrical routes to allow the LED assembly 60 to electrically connect to the solder pads 26, 32, or 34. Accordingly, some of the traces are referred to as first traces 22 while other traces are referred to as second traces 24. In the illustrated embodiment, the mounting pad 28 includes portions of both the first traces 22 and the second traces 24. In the illustrated example, the LED assembly 60 is placed on the first trace 22 portion of the mounting pad 28 thereby making contact with the first trace 22. In the illustrated embodiment, a top of the LED assembly 60 and the second traces 24 are connected to each other via a bond wire 62. Depending on the construction and orientation of LED assembly 60, first traces 22 may provide anode (positive) connections and second traces 24 may comprise cathode (negative) connections for the LED assembly 60 (or vice versa).
The LED assembly 60 can include additional elements. For example, in FIGS. 1B and 2C, the LED assembly 60 is illustrated including an LED bond wire 62, an LED subassembly 64, and a light emitting diode (LED) 66. Such an LED subassembly 64 is known in the art and is illustrated for the purposes of discussing the invention and is not meant to be a limitation of the present invention. In the Figures, the LED assembly 60 is shown die-attached to the substrate 20. In alternative embodiments, the mounting pad 28 can be configured to allow flip-chip attachment of the LED assembly 60. Additionally, multiple LED assemblies can be mounted on the mounting pad 28. In alternative embodiments, the LED assembly 60 can be mounted over multiple traces. This is especially true if flip-chip technology is used.
The topology of the traces 22 and 24 can vary widely from the topology illustrated in the Figures while still remaining within the scope of the example embodiments of the present invention. In the Figures, three separate cathode (negative) traces 24 are shown to illustrate that three LED assemblies can be placed on the mounting pad 28, each connected to a different cathode (negative) trace; thus, the three LED assemblies may be separately electrically controllable. The traces 22 and 24 are made of conductive material such as gold, silver, tin, or other metals. The traces 22 and 24 can have dimensions as illustrated in the Figures and are of a thickness on the order of microns or tens of microns, depending on application. In an example, the traces 22 and 24 can be 15 microns thick. FIGS. 1A and 2A illustrate an orientation marking 27. Such markings can be used to identify the proper orientation of the die package 10 even after assembling the die package 10. The traces 22 and 24, as illustrated, can extend from the mounting pad 28 to sides of the substrate 20.
The substrate 20 can be manufactured as one individual section of a strip or a plate having a plurality of adjacent sections, each section being a substrate 20. Alternatively, the substrate 20 can be manufactured as one individual section of an array of sections, the array having multiple rows and columns of adjacent sections. In this configuration, the semi-cylindrical spaces 23 and quarter-cylindrical spaces 25 can be utilized as tooling holes for the strip, the plate, or the array during the manufacturing process.
Furthermore, the semi-cylindrical spaces 23 and the quarter-cylindrical spaces 25, combined with scribed grooves or other etchings between the sections, assist in separating each individual substrate from the strip, the plate, or the wafer. The separation can be accomplished by introducing physical stress to the perforation (semi through holes at a close pitch) or scribe lines made by laser, or premolded, or etched lines (crossing the semi-cylindrical spaces 23 and the quarter-cylindrical spaces 25) by bending the strip, the plate, or the wafer. These features simplify the manufacturing process and thus reduce costs by eliminating the need for special carrier fixtures to handle individual unit of the substrate 20 during the manufacturing process. Furthermore, the semi-cylindrical spaces 23 and the quarter-cylindrical spaces 25 serve as via holes connecting the top solder pads 26, the side solder pads 32, and the bottom solder pads 34.
The substrate 20 has a bottom surface 29 including a thermal contact pad 36. The thermal contact pad 36 can be fabricated using a material having a high thermally and electrically conductive properties such as gold, silver, tin, or another material including but not limited to precious metals.
FIG. 3 illustrates a cut-away side view of portions of the semiconductor package of FIGS. 1A and 1B. In particular, the FIG. 3 illustrates a cut-away side view of the top heat sink 40 and the lens 50. Referring to FIGS. 1A, 1B, and 3, the top heat sink 40 is made from a material having high thermal conductivity such as aluminum, copper, ceramics, plastics, composites, or a combination of these materials. A high temperature, mechanically tough, dielectric material can be used to overcoat the traces 22 and 24 (with the exception of the central die-attach area) to seal the traces 22 and 24 and provide protection from physical and environmental harm such as scratches and oxidation. The overcoating process can be a part of the substrate manufacturing process. The overcoat, when used, may insulate the substrate 20 from the top heat sink 40. The overcoat may then be covered with a high temperature adhesive such as thermal interface material manufactured by THERMOSET that bonds the substrate 20 to the top heat sink 40.
The top heat sink 40 may include a reflective surface 42 substantially surrounding the LED assembly 60 mounted on the mounting pad 28 (of FIGS. 2A and 2C). When the top heat sink 40 is used to dissipate heat generated by the LED in the die package 10, it can be “top-mounted” directly onto an external heat sink by an adhesive or solder joint to dissipate heat efficiently. In another embodiment, if heat has to be dissipated by either a compressible or non-compressible medium such as air or cooling fluid, the top heat sink 40 may be equipped with cooling fins or any feature that will enhance heat transfer between the top heat sink 40 and the cooling medium. In both of these embodiments, the electrical terminals and the bottom heat sink 20 of the die package 10 can still be connected to its application printed circuit board (PCB) using, for example, the normal surface-mount-technology (SMT) method.
The reflective surface 42 reflects portions of light from the LED assembly 60 as illustrated by sample light rays 63. Other portions of the light are not reflected by the reflective surface 42 as illustrated by sample light ray 61. Illustrative light rays 61 and 63 are not meant to represent light traces often use in the optical arts. For efficient reflection of the light, the top heat sink 40 is preferably made from material that can be polished, coined, molded, or any combination of these. Alternatively, to achieve high reflectivity, the optical reflective surface 42 or the entire heat sink 40 can be plated or deposited with high reflective material such as silver, aluminum, or any substance that serves the purpose. For this reason, the top heat sink 40 is also referred to as a reflector plate 40. The reflector plate 40 is made of material having high thermal conductivity if and when required by the thermal performance of the package 10. In the illustrated embodiment, the reflective surface 42 is illustrated as a flat surface at an angle, for example 45 degrees, relative to the reflective plate's horizontal plane. The example embodiments are not limited to the illustrated embodiment. For example, the reflective surface 42 can be at a different angle relative to the reflective plate's horizontal plane. Alternatively, the reflective plate can have a parabolic, toroid or any other shape that helps to meet the desired spectral luminous performance of the package.
The reflective plate 40 includes a ledge 44 for supporting and coupling with the lens 50. The LED assembly 60 is encapsulated within the die package 10 (of FIGS. 1A and 1B) using encapsulation material 46 such as, for example only, soft and elastic silicones or polymers. The encapsulation material 46 can be a high temperature polymer with high light transmissivity and refractive index that matches or closely matches refractive index of the lens 50, for example. The encapsulant 46 is not affected by most wavelengths that alter its light transmissivity or clarity.
The lens 50 is made from material having high light transmissivity such as, for example only, glass, quartz, high temperature and transparent plastic, or a combination of these materials. The lens 50 is placed on top of and adheres to the encapsulation material 46. The lens 50 is not rigidly bonded to the reflector 40. This “floating lens” design enables the encapsulant 46 to expand and contract under high and low temperature conditions without difficulty. For instance, when the die package 10 is operating or being subjected to a high temperature environment, the encapsulant 46 experiences greater volumetric expansion than the cavity space that contains it. By allowing the lens 50 to float up somewhat freely on top of the encapsulant 46, no encapsulant will be squeezed out of its cavity space. Likewise, when the die package 10 is subjected to a cold temperature, the encapsulant 46 will contract more than the other components that make up the cavity space for the encapsulant 46; the lens will float freely on top of the encapsulant 46 as the latter shrinks and its level drops. Hence, the reliability of the die package 10 is maintained over relatively large temperature ranges as the thermal stresses induced on the encapsulant 46 is reduced by the floating lens design.
In some embodiments, the lens 50 defines a recess 52 (See FIG. 3) having a curved, hemispherical, or other geometry, which can be filled with optical materials intended to influence or change the nature of the light emitted by the LED chip(s) before it leaves the die package 10. Examples of one type of optical materials include luminescence converting phosphors, dyes, fluorescent polymers or other materials which absorb some of the light emitted by the chip(s) and re-emit light of different wavelengths. Examples of another type of optical materials include light diffusants such as calcium carbonate, scattering particles (such as Titanium oxides) or voids which disperse or scatter light. Any one or a combination of the above materials can be applied on the lens 50 to obtain certain spectral luminous performance.
An example embodiment having an alternate configuration is shown in FIGS. 5 through 6D. Portions of this second embodiment are similar to corresponding portions of the first embodiment illustrated in FIGS. 1A through 4. For convenience, portions of the second embodiment as illustrated in FIGS. 5 through 6D that are similar to portions of the first embodiment are assigned the same reference numerals, analogous but changed portions are assigned the same reference numerals accompanied by letter “a,” and different portions are assigned different reference numerals.
FIG. 5 is an exploded perspective view of an LED die package 10 a in accordance with other embodiments of the present invention. Referring to FIG. 5, the light emitting die package 10 a of the present invention includes a bottom heat sink (substrate) 20 a, atop heat sink (reflector plate) 40 a, and a lens 50.
FIGS. 6A, 6B, 6C, and 6D, provide, respectively, a top view, a side view, a front view, and a bottom view of the substrate 20 a of FIG. 5. Referring to FIGS. 5 through 6D, the substrate 20 a includes one first trace 22 a and four second traces 24 a. Traces 22 a and 24 a are configured differently than traces 22 and 24 of FIG. 2A. The substrate 20 a includes flanges 31 that define latch spaces 33 for reception of legs 35 of the reflector plate 40 a, thereby mechanically engaging the reflector plate 40 a with the substrate 20 a. The example embodiments of the present invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the exemplary embodiments of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS3443140Apr 6, 1965May 6, 1969Gen ElectricLight emitting semiconductor devices of improved transmission characteristicsUS3760237Jun 21, 1972Sep 18, 1973Gen ElectricSolid state lamp assembly having conical light directorUS3875456Apr 4, 1973Apr 1, 1975Hitachi LtdMulti-color semiconductor lampUS4152618Mar 29, 1978May 1, 1979Tokyo Shibaura Electric Co., Ltd.Light-emitting display device including light diffusing filmUS4168102Oct 12, 1977Sep 18, 1979Tokyo Shibaura Electric Co., Ltd.Light-emitting display device including a light diffusing bonding layerUS4267559Sep 24, 1979May 12, 1981Bell Telephone Laboratories, IncorporatedLow thermal impedance light-emitting diode packageUS4603496Feb 4, 1985Aug 5, 1986Adaptive Micro Systems, Inc.Electronic display with lens matrixUS5119174Oct 26, 1990Jun 2, 1992Chen Der JongLight emitting diode display with PCB baseUS5173839Mar 5, 1992Dec 22, 1992Grumman Aerospace CorporationHeat-dissipating method and device for led displayUS5633963Dec 12, 1995May 27, 1997Raytheon CompanyOptical rotary joint for single and multimode fibersUS5649757Nov 4, 1994Jul 22, 1997Aleman; Thomas M.Aquarium background illuminatorUS5785418Oct 20, 1997Jul 28, 1998Hochstein; Peter A.Thermally protected LED arrayUS5789772Aug 18, 1997Aug 4, 1998The Whitaker CorporationSemi-insulating surface light emitting devicesUS5835661Nov 26, 1996Nov 10, 1998Tai; Ping-KaungLight expanding system for producing a linear or planar light beam from a point-like light sourceUS5841177Jul 10, 1997Nov 24, 1998Kabushiki Kaisha ToshibaMulticolor light emitting deviceUS5847507Jul 14, 1997Dec 8, 1998Hewlett-Packard CompanyFluorescent dye added to epoxy of light emitting diode lensUS5849396Sep 13, 1995Dec 15, 1998Hughes Electronics CorporationMultilayer electronic structure and its preparationUS5851847Jun 10, 1997Dec 22, 1998Sony CorporationPhotonic device and process for fabricating the sameUS5857767Feb 25, 1997Jan 12, 1999Relume CorporationThermal management system for L.E.D. arraysUS5869883Sep 26, 1997Feb 9, 1999Stanley Wang, President Pantronix Corp.Packaging of semiconductor circuit in pre-molded plastic packageUS5907151May 27, 1997May 25, 1999Siemens AktiengesellschaftSurface mountable optoelectronic transducer and method for its productionUS5959316Sep 1, 1998Sep 28, 1999Hewlett-Packard CompanyMultiple encapsulation of phosphor-LED devicesUS5982090Oct 6, 1997Nov 9, 1999Kaiser Aerospace And Electronics CoporationIntegrated dual mode flat backlightUS5998925Jul 29, 1997Dec 7, 1999Nichia Kagaku Kogyo Kabushiki KaishaLight emitting device having a nitride compound semiconductor and a phosphor containing a garnet fluorescent materialUS6060729Nov 19, 1998May 9, 2000Rohm Co., Ltd.Light-emitting deviceUS6124635Mar 17, 1998Sep 26, 2000Honda Giken Kogyo Kabushiki KaishaFunctionally gradient integrated metal-ceramic member and semiconductor circuit substrate application thereofUS6155699Mar 15, 1999Dec 5, 2000Agilent Technologies, Inc.Efficient phosphor-conversion led structureUS6159033Jun 14, 1999Dec 12, 2000Sumitomo Wiring Systems, Ltd.Electrical connection boxUS6180962Oct 22, 1999Jan 30, 2001Rohm Co., Ltd.Chip type semiconductor light emitting device having a solder preventive portionUS6238599Jun 18, 1997May 29, 2001International Business Machines CorporationHigh conductivity, high strength, lead-free, low cost, electrically conducting materials and applicationsUS6274924Nov 5, 1998Aug 14, 2001Lumileds Lighting, U.S. LlcSurface mountable LED packageUS6281435Feb 29, 2000Aug 28, 2001Rohm Co., Ltd.Chip-type electronic devicesUS6307272May 25, 1999Oct 23, 2001Hitachi, Ltd.Semiconductor device and method for manufacturing the sameUS6318886Feb 11, 2000Nov 20, 2001Whelen Engineering CompanyHigh flux led assemblyUS6329706Aug 23, 2000Dec 11, 2001Fairchild Korea Semiconductor, Ltd.Leadframe using chip pad as heat conducting path and semiconductor package adopting the sameUS6331063Nov 25, 1998Dec 18, 2001Matsushita Electric Works, Ltd.LED luminaire with light control meansUS6335548Oct 22, 1999Jan 1, 2002Gentex CorporationSemiconductor radiation emitter packageUS6362964Nov 9, 2000Mar 26, 2002International Rectifier Corp.Flexible power assemblyUS6429513May 25, 2001Aug 6, 2002Amkor Technology, Inc.Active heat sink for cooling a semiconductor chipUS6444498Nov 15, 2001Sep 3, 2002Siliconware Precision Industries Co., LtdMethod of making semiconductor package with heat spreaderUS6456766Feb 1, 2000Sep 24, 2002Cornell Research Foundation Inc.Optoelectronic packagingUS6457645Apr 13, 1999Oct 1, 2002Hewlett-Packard CompanyOptical assembly having lens offset from optical axisUS6468821Sep 7, 2001Oct 22, 2002Matsushita Electric Industrial Co., Ltd.Method for fabricating semiconductor light-emitting unitUS6469322May 30, 2000Oct 22, 2002General Electric CompanyGreen emitting phosphor for use in UV light emitting diodesUS6480389Mar 19, 2002Nov 12, 2002Opto Tech CorporationHeat dissipation structure for solid-state light emitting device packageUS6492725Feb 4, 2000Dec 10, 2002Lumileds Lighting, U.S., LlcConcentrically leaded power semiconductor device packageUS6501103Oct 23, 2001Dec 31, 2002Lite-On Electronics, Inc.Light emitting diode assembly with low thermal resistanceUS6525386Mar 10, 1998Feb 25, 2003Masimo CorporationNon-protruding optoelectronic lensUS6531328Oct 11, 2001Mar 11, 2003Solidlite CorporationPackaging of light-emitting diodeUS6541800Feb 11, 2002Apr 1, 2003Weldon Technologies, Inc.High power LEDUS6559525Jan 13, 2000May 6, 2003Siliconware Precision Industries Co., Ltd.Semiconductor package having heat sink at the outer surfaceUS6582103Jul 20, 2000Jun 24, 2003Teledyne Lighting And Display Products, Inc.Lighting apparatusUS6610563Dec 15, 1998Aug 26, 2003Osram Opto Semiconductors Gmbh & Co. OhgSurface mounting optoelectronic component and method for producing sameUS6614103Sep 1, 2000Sep 2, 2003General Electric CompanyPlastic packaging of LED arraysUS6670648Jul 17, 2002Dec 30, 2003Rohm Co., Ltd.Semiconductor light-emitting device having a reflective caseUS6672734Oct 25, 2001Jan 6, 2004Lumileds Lighting U.S., LlcIllumination system and display deviceUS6680491Jul 12, 2002Jan 20, 2004Matsushita Electric Industrial Co., Ltd.Optical electronic apparatus and method for producing the sameUS6680568Feb 9, 2001Jan 20, 2004Nippon Leiz CorporationLight sourceUS6707069 *Jun 18, 2002Mar 16, 2004Samsung Electro-Mechanics Co., LtdLight emission diode packageUS6710544Jan 30, 2002Mar 23, 2004Patent-Treuhand-Gesellschaft f�r elektrische Gl�hiampen mbHReflector-containing semiconductor componentUS6759803Oct 22, 2001Jul 6, 2004Osram Opto Semiconductors Gmbh & Co. OhgLED light source with lens and corresponding production methodUS6768525Dec 1, 2000Jul 27, 2004Lumileds Lighting U.S. LlcColor isolated backlight for an LCDUS6789921Mar 25, 2003Sep 14, 2004Rockwell CollinsMethod and apparatus for backlighting a dual mode liquid crystal displayUS6791259Aug 22, 2000Sep 14, 2004General Electric CompanySolid state illumination system containing a light emitting diode, a light scattering material and a luminescent materialUS6809347Nov 19, 2001Oct 26, 2004Leuchtstoffwerk Breitungen GmbhLight source comprising a light-emitting elementUS6844903Apr 4, 2001Jan 18, 2005Lumileds Lighting U.S., LlcBlue backlight and phosphor layer for a color LCDUS6849867Jan 8, 2003Feb 1, 2005Gentex CorporationMethod of making radiation emitter devicesUS6850001Oct 9, 2002Feb 1, 2005Agilent Technologies, Inc.Light emitting diodeUS6864567May 16, 2003Mar 8, 2005San-Hua YuBase of LEDUS6874910Dec 3, 2001Apr 5, 2005Matsushita Electric Works, Ltd.Light source device using LED, and method of producing sameUS6897486Nov 25, 2003May 24, 2005Ban P. LohLED package die having a small footprintUS6903380Apr 11, 2003Jun 7, 2005Weldon Technologies, Inc.High power light emitting diodeUS6943380Dec 28, 2001Sep 13, 2005Toyoda Gosei Co., Ltd.Light emitting device having phosphor of alkaline earth metal silicateUS6943433Dec 13, 2002Sep 13, 2005Nichia CorporationSemiconductor device and manufacturing method for sameUS6949772Feb 26, 2003Sep 27, 2005Matsushita Electric Industrial Co., Ltd.LED illumination apparatus and card-type LED illumination sourceUS6960878Jan 24, 2002Nov 1, 2005Nichia CorporationLight emitting diode, optical semiconductor element and epoxy resin composition suitable for optical semiconductor element and production methods thereforUS7044620Apr 30, 2004May 16, 2006Guide CorporationLED assembly with reverse circuit boardUS7078254Jan 13, 2005Jul 18, 2006Cree, Inc.LED package die having a small footprintUS7078728Jul 27, 2004Jul 18, 2006Citizen Electronics Co., Ltd.Surface-mounted LED and light emitting deviceUS7084435Jan 6, 2003Aug 1, 2006Matsushita Electric Works, Ltd.Light emitting device using LEDUS7118262Jul 23, 2004Oct 10, 2006Cree, Inc.Reflective optical elements for semiconductor light emitting devicesUS7122884Apr 14, 2003Oct 17, 2006Fairchild Semiconductor CorporationRobust leaded molded packages and methods for forming the sameUS7192163Nov 16, 2005Mar 20, 2007Lg.Philips Lcd Co. Ltd.Light-emitting unit with enhanced thermal dissipation and method for fabricating the sameUS7196163Apr 30, 2003Mar 27, 2007Merk & Co., Inc.Assays using amyloid precursor proteins with modified β-secretase cleavage sites to monitor β-secretase activityUS7204631Jun 30, 2004Apr 17, 20073M Innovative Properties CompanyPhosphor based illumination system having a plurality of light guides and an interference reflectorUS7244965Oct 22, 2003Jul 17, 2007Cree Inc,Power surface mount light emitting die packageUS7264378May 27, 2003Sep 4, 2007Cree, Inc.Power surface mount light emitting die packageUS7279719Mar 21, 2003Oct 9, 2007Toyoda Gosei Co., Ltd.Light emitting diodeUS7280288Jun 4, 2004Oct 9, 2007Cree, Inc.Composite optical lens with an integrated reflectorUS7322732Dec 23, 2004Jan 29, 2008Cree, Inc.Light emitting diode arrays for direct backlighting of liquid crystal displaysUS7329399Aug 25, 2004Feb 12, 2008Commissariat A L'energie AtomiqueHydrogen trapper compound, method for the production and uses thereofUS7456499Jun 4, 2004Nov 25, 2008Cree, Inc.Power light emitting die package with reflecting lens and the method of making the sameUS7659551 *Feb 9, 2010Cree, Inc.Power surface mount light emitting die packageUS7692206Nov 25, 2003Apr 6, 2010Cree, Inc.Composite leadframe LED package and method of making the sameUS7775685 *Aug 17, 2010Cree, Inc.Power surface mount light emitting die packageUS20020084462Sep 28, 2001Jul 4, 2002Shingo TamaiLight emission deviceUS20030057573Sep 23, 2002Mar 27, 2003Kabushiki Kaisha ToshibaSemiconductor deviceUS20030193083Apr 11, 2003Oct 16, 2003Citizen Electronics Co., Ltd.Substrate for light emitting diodesUS20030201451Mar 21, 2003Oct 30, 2003Toyoda Gosei Co., Ltd.Light emitting diodeUS20040004435Jul 4, 2002Jan 8, 2004Chi-Hsing HsuImmersion cooling type light emitting diode and its packaging methodUS20050001433Apr 30, 2004Jan 6, 2005Seelink Technology CorporationDisplay system having uniform luminosity and wind generatorUS20050093430Feb 24, 2004May 5, 2005Cree, Inc.Composite white light source and method for fabricatingUS20050152146Nov 8, 2004Jul 14, 2005Owen Mark D.High efficiency solid-state light source and methods of use and manufactureUS20050265029Jun 1, 2004Dec 1, 20053M Innovative Properties CompanyLed array systemsUS20060083017Oct 18, 2005Apr 20, 2006Bwt Propety, Inc.Solid-state lighting apparatus for navigational aidsUS20060097385Oct 25, 2004May 11, 2006Negley Gerald HSolid metal block semiconductor light emitting device mounting substrates and packages including cavities and heat sinks, and methods of packaging sameUS20060098441Mar 14, 2005May 11, 2006Au Optronics Corp.Backlight moduleUS20060215075Mar 23, 2005Sep 28, 2006Chi-Jen HuangBacklight Module of LCD DeviceUS20060263545May 20, 2005Nov 23, 2006Coenjarts Christopher ALight-diffusing films, backlight display devices comprising the light-diffusing films, and methods of making the sameUS20070054149Aug 23, 2005Mar 8, 2007Chi-Ming ChengSubstrate assembly of a display device and method of manufacturing the sameUS20070085194Nov 9, 2006Apr 19, 20073M Innovative Properties CompanyDielectric composite materialUS20080231170Jan 26, 2005Sep 25, 2008Fukudome MasatoWavelength Converter, Light-Emitting Device, Method of Producing Wavelength Converter and Method of Producing Light-Emitting DeviceUSD465207Jun 8, 2001Nov 5, 2002Gem Services, Inc.Leadframe matrix for a surface mount packageUSRE37707Jul 2, 1996May 21, 2002Stmicroelectronics S.R.L.Leadframe with heat dissipator connected to S-shaped fingersDE19945919A1Sep 24, 1999Mar 30, 2000Rohm Co LtdLight emitting semiconductor device has an epoxy resin encapsulation of low glass transition temperature to reduce crack-inducing thermal stresses on surface mounting of the device e.g. on a wiring boardEP0965493B1Jun 11, 1999Feb 11, 2004Sumitomo Wiring Systems, Ltd.Electrical connection boxEP1059678A2Mar 29, 2000Dec 13, 2000Sanyo Electric Co., Ltd.Hybrid integrated circuit deviceEP1087447A1Mar 16, 2000Mar 28, 2001Rohm Co., Ltd.Light-emitting semiconductor chipEP1179858B1Aug 8, 2001Mar 18, 2009Avago Technologies General IP (Singapore) Pte. LtdLight emitting devicesEP1416219A1Aug 8, 2002May 6, 2004Matsushita Electric Industrial Co., Ltd.Led illuminator and card type led illuminating light sourceEP1418628B1Jul 26, 2002May 22, 2013Panasonic CorporationLight emitting device using ledEP1537603B1Sep 2, 2003Jul 9, 2008Cree, Inc.Power surface mount light emitting die packageEP1680816B1Oct 20, 2004Sep 30, 2009Cree, Inc.Power surface mount light emitting die packageEP1953825B1Sep 2, 2003Jul 24, 2013Cree, Inc.Power surface mount light emitting die packageTW518775B Title not available* Cited by examinerNon-Patent CitationsReference1Advisory Action corresponding to U.S. Appl. No. 11/168,018 dated May 13, 2010.2Chinese Notice of Patent Grant for CN Appl No. 200480030943.3 dated Oct. 29, 2010.3Chinese Office Action for Appl. No. 03820849 with English translation dated Jul. 6, 2007.4Chinese Office Action for CN 2004-80030943.3 (with English Translation) dated Jul. 4, 2008 but received Aug. 7, 2008 (incorrectly dated on some docs as Aug. 4, 2008).5Chinese Office Action for CN 2004-80030943.3 with English translation dated Dec. 12, 2008.6Chinese Patent Certificate for TW Patent No. 1331380 dated Oct. 1, 2010.7Communication dated May 13, 2009 regarding no Opposition for European Application No. 03794564.9-2222 / Patent No. 1537603.8Communication Under Rule 71(3) EPC (with enclosures) regarding intent to grant European patent for Application No. 04795871.5-222 dated Apr. 24, 2009.9Decision to Grant from European Patent Office corresponding to European Patent Application No. 1,680,816 dated Sep. 3, 2009.10EPO Notice of Patent Grant for EP 03794564.9 dated Jun. 12, 2008.11European Examination Report corresponding to European Patent Application No. 04795871.5 dated Nov. 12, 2007.12European Notice of Publication for EP 08157294 dated Jul. 9, 2008.13European Office Action corresponding to European Patent Application No. 09171045.9 dated Jun. 18, 2010.14European Office Action for EP Appl. No. 08157294.3 dated Mar. 16, 2009.15European Search Report and Written Opinion for EP 08157294.3 dated Aug. 20, 2008.16European Search Report corresponding to European Patent Application No. 09171045.9 dated Nov. 23, 2009.17Final Office Action corresponding to U.S. Appl. No. 11/153,724 dated Apr. 27, 2010.18Final Office Action corresponding to U.S. Appl. No. 11/168,018 dated Dec. 10, 2008.19Final Office Action for U.S. Appl. No. 11/153,724 dated Jul. 1, 2008.20Final Office Action for U.S. Appl. No. 11/153,724 dated Mar. 23, 2009.21Final Official Action corresponding to U.S. Appl. No. 10/692,351 dated Nov. 16, 2005.22International Search Report and Written Opinion for PCT/US06/025193 dated Oct. 29, 2007.23International Search Report corresponding to PCT International Application No. PCT/US03/27421 dated Nov. 10, 2004.24International Search Report corresponding to PCT International Application No. PCT/US04/34768 dated Apr. 21, 2005.25International Search Report dated Feb. 27, 2007.26IPO (TW) Notice of Allowance corresponding to TW Patent Application No. 092123988 dated Jun. 8, 2010.27Japanese Notice of Issuance for JP 4602345 dated Oct. 8, 2010.28Japanese Office Action (English Translation) corresponding to Japanese Patent Application No. 2004-534428 dated Feb. 23, 2010.29Japanese Office Action (English Translation) corresponding to Japanese Patent Application No. 2006-536764 dated Feb. 2, 2010.30Japanese Office Action/Rejection (English Translation) corresponding to Japanese Patent Appl. No. 2004-534428 dated Oct. 19, 2010.31Korean Patent Office Action corresponding to KR 10-2005-7003428 dated Jul. 29, 2010.32Non-Final Office Action for U.S. Appl. No. 11/153,724 dated Sep. 15, 2010.33Non-final Office Action for U.S. Appl. No. 11/689,868 dated Jan. 26, 2009.34Non-final Office Action for U.S. Appl. No. 11/694,046 dated Dec. 1, 2008.35Non-Final Office Action for U.S. Appl. No. 12/856,320 dated Sep. 14, 2010.36Non-Final Official Action corresponding to U.S. Appl. No. 10/446,532 dated Jul. 26, 2005.37Non-Final Official Action corresponding to U.S. Appl. No. 10/446,532 dated May 2, 2006.38Non-Final Official Action corresponding to U.S. Appl. No. 10/692,351 dated Feb. 24, 2005.39Notice of Allowance corresponding to U.S. Appl. No. 11/703,721 dated Apr. 16, 2010.40Notice of Allowance dated Jul. 24, 2009 regarding U.S. Appl. No. 11/694,046.41Notification of International Preliminary Report on Patentability and Written Opinion corresponding to PCT International Application No. PCT/US06/025193 dated Jan. 17, 2008.42Notification of International Preliminary Report on Patentability and Written Opinion corresponding to PCT International Application No. PCT/US06/025193 dated Jan. 23, 2007. (mail date).43Notification of International Preliminary Report on Patentability and Written Opinion for PCT International Application No. PCT/US06/023195 dated Jan. 3, 2008.44Office Action (with English Summary) dated Apr. 28, 2009 regarding Japanese Patent Application No. 2004-534428.45Office Action for U.S. Appl. No. 11/153,724 dated Oct. 17, 2008.46Office Action with Restriction/Election Requirement dated Oct. 20, 2008 for U.S. Appl. No. 11/689,868.47Office Action with Restriction/Election Requirement for U.S. Appl. No. 11/703,721 dated Feb. 26, 2009.48Official Action and Search Report corresponding to Taiwan Patent Application No. 092123988 dated Sep. 11, 2009 (with English Translation).49Official Action corresponding to Chinese Patent Application No. 2004800309433 (with English Translation) dated Sep. 25, 2009.50Official Action corresponding to Japanese Patent Application No. 2006-536764 (with English Translation) dated Jun. 9, 2009.51Official Action corresponding to U.S. Appl. No. 11/153,724 dated May 3, 2007.52Official Action corresponding to U.S. Appl. No. 11/153,724 dated Nov. 2, 2006.53Official Action corresponding to U.S. Appl. No. 11/153,724 dated Nov. 9, 2009.54Official Action corresponding to U.S. Appl. No. 11/153,724 dated Oct. 16, 2007.55Official Action corresponding to U.S. Appl. No. 11/168,018 dated Jul. 7, 2009.56Official Action corresponding to U.S. Appl. No. 11/168,018 dated Mar. 2, 2010.57Official Action corresponding to U.S. Appl. No. 11/168,018 dated Mar. 27, 2008.58Official Action corresponding to U.S. Appl. No. 11/168,018 dated May 28, 2008.59Official Action corresponding to U.S. Appl. No. 11/689,868 dated Jul. 17, 2009.60Official Action corresponding to U.S. Appl. No. 11/694,046 dated May 7, 2008.61Official Action corresponding to U.S. Appl. No. 11/694,046 dated Oct. 25, 2007.62Official Action corresponding to U.S. Appl. No. 11/703,721 dated Aug. 6, 2009.63Official Action with Advisory Action corresponding to U.S. Appl. No. 10/692,351 dated Apr. 4, 2006.64Official Action with Restriction/Election Requirement corresponding to U.S. Appl. No. 10/446,532 dated Feb. 24, 2005.65Official Action with Restriction/Election Requirement corresponding to U.S. Appl. No. 10/692,351 dated Oct. 5, 2004.66Official Action with Restriction/Election Requirement'corresponding to U.S. Appl. No. 10/446,532 dated Nov. 3, 2004.67Official Action/Restriction Requirement corresponding to U.S. Appl. No. 11/168,018 dated Dec. 11, 2007.68Supplemental European Search Report corresponding to EP Appl. No. 03794564.9 dated Aug. 22, 2006.69Supplemental European Search Report corresponding to European Patent Application No. 04795871 dated Mar. 7, 2007.Referenced byCiting PatentFiling datePublication dateApplicantTitleUS8115229 *Mar 19, 2010Feb 14, 2012Cid Technologies LlcArrangement for dissipating thermal energy generated by a light emitting diodeUS8167463May 1, 2012Cree, Inc.Power surface mount light emitting die packageUS8168990 *May 1, 2012Cid Technologies LlcApparatus for dissipating thermal energy generated by current flow in semiconductor circuitsUS8188488May 29, 2012Cree, Inc.Power surface mount light emitting die packageUS8308331Jul 1, 2011Nov 13, 2012Cree, Inc.LED backlighting for displaysUS8530915Feb 7, 2011Sep 10, 2013Cree, Inc.Power surface mount light emitting die packageUS8608349Feb 8, 2011Dec 17, 2013Cree, Inc.Power surface mount light emitting die packageUS8622582Feb 8, 2011Jan 7, 2014Cree, Inc.Power surface mount light emitting die packageUS8710514May 25, 2012Apr 29, 2014Cree, Inc.Power surface mount light emitting die packageUS8747552Dec 18, 2009Jun 10, 2014Crystal Is, Inc.Doped aluminum nitride crystals and methods of making themUS8962359Jul 19, 2012Feb 24, 2015Crystal Is, Inc.Photon extraction from nitride ultraviolet light-emitting devicesUS9028612Jun 30, 2011May 12, 2015Crystal Is, Inc.Growth of large aluminum nitride single crystals with thermal-gradient controlUS9034103Jun 30, 2010May 19, 2015Crystal Is, Inc.Aluminum nitride bulk crystals having high transparency to ultraviolet light and methods of forming themUS9182098Sep 19, 2013Nov 10, 2015Venntis Technologies LLCDevice for scattering lightUS9299880Mar 13, 2014Mar 29, 2016Crystal Is, Inc.Pseudomorphic electronic and optoelectronic devices having planar contactsUS20060292747 *Jun 27, 2005Dec 28, 2006Loh Ban PTop-surface-mount power light emitter with integral heat sinkUS20100237363 *Sep 23, 2010Christy Alexander CApparatus for Dissipating Thermal Energy Generated by Current Flow in Semiconductor CircuitsUS20100237364 *Mar 19, 2010Sep 23, 2010Christy Alexander CThermal Energy Dissipating and Light Emitting Diode Mounting ArrangementUS20100252853 *Mar 19, 2010Oct 7, 2010Christy Alexander CThermal Energy Dissipating Arrangement for a Light Emitting DiodeUS20100252854 *Mar 19, 2010Oct 7, 2010Christy Alexander CArrangement for Dissipating Thermal Energy Generated by a Light Emitting DiodeUS20110121345 *May 26, 2011Peter Scott AndrewsPower surface mount light emitting die packageUS20110186897 *Aug 4, 2011Loh Ban PPower surface mount light emitting die packageUS20130322088 *Sep 6, 2012Dec 5, 2013Foshan Nationstar Optoelectronics Co., Ltd.Large-Angle Lens and Large-Angle Emission LED Light Source ModuleUSD718490 *Mar 15, 2013Nov 25, 2014Cree, Inc.LED lens* Cited by examinerClassifications U.S. Classification362/245, 362/246, 257/98, 362/294, 362/800International ClassificationF21V5/00, H01L33/58, H01L33/54Cooperative ClassificationH01L2924/0002, Y10S362/80, H01L33/641, H01L33/58, H01L33/54European ClassificationH01L33/58, H01L33/64BLegal EventsDateCodeEventDescriptionDec 24, 2014FPAYFee paymentYear of fee payment: 4RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services