Source: http://www.google.com/patents/US20040262717?dq=6,952,563
Timestamp: 2016-05-04 13:42:11
Document Index: 344827102

Matched Legal Cases: ['arts 1', 'arts 1', 'arts 1', 'art 14', 'art 1', 'art 13', 'art 14', 'art 13', 'art 14', 'art 13', 'art 14', 'art 13', 'art 13', 'art 14', 'art 13']

Patent US20040262717 - Conductor frame and housing for a radiation-emitting component, radiation ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsLeadframe and housing for a radiation-emitting component, radiation-emitting component and display and/or illumination arrangement with radiation-emitting components The invention describes a leadframe for a surface-mountable radiation-emitting component, preferably a light-emitting diode component,...http://www.google.com/patents/US20040262717?utm_source=gb-gplus-sharePatent US20040262717 - Conductor frame and housing for a radiation-emitting component, radiation-emitting component and display and/or illumination system using radiation-emitting componentsAdvanced Patent SearchPublication numberUS20040262717 A1Publication typeApplicationApplication numberUS 10/487,576PCT numberPCT/DE2002/002866Publication dateDec 30, 2004Filing dateAug 2, 2002Priority dateAug 21, 2001Also published asCN1545737A, CN100359703C, EP1435118A2, EP1435118B1, US7193299, WO2003019677A2, WO2003019677A3Publication number10487576, 487576, PCT/2002/2866, PCT/DE/2/002866, PCT/DE/2/02866, PCT/DE/2002/002866, PCT/DE/2002/02866, PCT/DE2/002866, PCT/DE2/02866, PCT/DE2002/002866, PCT/DE2002/02866, PCT/DE2002002866, PCT/DE200202866, PCT/DE2002866, PCT/DE202866, US 2004/0262717 A1, US 2004/262717 A1, US 20040262717 A1, US 20040262717A1, US 2004262717 A1, US 2004262717A1, US-A1-20040262717, US-A1-2004262717, US2004/0262717A1, US2004/262717A1, US20040262717 A1, US20040262717A1, US2004262717 A1, US2004262717A1InventorsKarlheinz Arndt, Georg Bogner, Gunter WaitlOriginal AssigneeKarlheinz Arndt, Georg Bogner, Gunter WaitlExport CitationBiBTeX, EndNote, RefManPatent Citations (1), Referenced by (12), Classifications (12), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetConductor frame and housing for a radiation-emitting component, radiation-emitting component and display and/or illumination system using radiation-emitting components
[0032] Identical or identically acting elements are provided with the same reference symbols in the figures. [0033] The leadframe 1 illustrated in FIG. 1 is embodied in planar fashion and in two parts. The two leadframe parts 1 a and 1 b each have a connection strip 2 a, 2 b joined by a deformation element 3 a, 3 b. The deformation element is preferably embodied as a spring element. [0034] From the deformation elements 3 a, 3 b the two leadframe parts 1 a, 1 b extend to a chip connection region 4. In this case, by way of example, one of the two leadframe parts 1 a projecting into the chip connection region 4 may be provided as chip connection part 14 with a mounting area for a chip, preferably a radiation-emitting semiconductor chip. The other leadframe part 1 b may correspondingly be formed as a wire connection part 13 and have a wire connection area which serves for making the electrical contact with the chip. [0035] The deformation elements or spring elements 3 a, 3 b are embodied in the form of narrow strips, the width of which is narrower than the width of the adjoining connection strips 2 a, 2 b. These spring strips run perpendicular to the longitudinal axis 5 of the leadframe 1, which coincides with the main direction of extent of the leadframe. [0036] The shaping described imparts a flexibility to the planar leadframe 1, so that strains in the leadframe plane, for example due to tension in the directions 7 a, 7 b shown, as may occur during or after the soldering-in process on account of different thermal expansion coefficients, are absorbed by means of the deformation elements 3 a, 3 b. This prevents, in particular, a transfer of the stresses to parts of a housing body 80 (indicated by the dashed contour in FIG. 1) in which such a leadframe is embedded, which stresses can lead to cracks or other kinds of damage of the housing. [0037] Circular holes 6 a, 6 b are furthermore formed in the leadframe 1, which holes improve the retention of the leadframe in a housing. Correspondingly formed pins of a housing body 80 can be passed through said holes 6 a, 6 b, and prevent a displacement of the leadframe within the housing to the greatest possible extent. If the housing body 80 is formed for example at least partly by the leadframe 1 being encapsulated with a molding compound, for example by means of an injection-molding or transfer-molding method, then the molding compound fills the holes, thereby forming the above-mentioned pins, which, in the solid state, provide for the additional retention of the leadframe in the housing. [0038] Furthermore, the connection strip 2 b has a projection 9, which enables the leadframe to be additionally projected into the housing body 80 and, in particular, serves to prevent bending of the connection strip 2 b and/or the adjoining deformation element 3 b out of the leadframe plane. In addition or as an alternative, a projection 10 at a housing may also serve for this purpose, as will be described in more detail below, said projection likewise preventing such bending. [0039] [0039]FIG. 2 shows a diagrammatic plan view of an exemplary embodiment of a housing according to the invention for a radiation-emitting component. [0040] In this case, a housing body 80 comprises a housing base body 8 which is largely rotationally symmetrical concerning the outer contour and has a circular contour in the illustration, in which a leadframe 1 is partly embedded. The leadframe 1, as in the previous exemplary embodiment, is formed in planar fashion and in two parts, the two leadframe parts each having an external connection strip 2 a, 2 b and an adjoining deformation element 3 a, 3 b and also a chip connection part 14 or respectively a wire connection part 13. Chip connection part 14 and wire connection part 13 are arranged at a distance from one another in a common chip connection region 4 in the housing. [0041] Furthermore, a projection 9 a, 9 b is in each case formed at the connection strips 2 a, 2 b, which projection projects into the housing base body 8 and thus prevents bending of the leadframe 1 perpendicularly to the leadframe plane. [0042] The housing base body 8 preferably comprises a molding compound and is produced by the leadframe 1 being encapsulated with said molding compound, for example by means of an injection-molding or transfer-molding method. In this case, the molding compound also fills the holes 6 a, 6 b and 6 c in the leadframe 1, thereby ensuring a mechanically stable anchoring of the leadframe 1 in the housing base body 8. [0043] The housing base body 8 furthermore has a radiation exit window 12 in the form of a truncated-cone-like recess which extends in the direction of the main emission direction and into which the chip connection part 14 and the wire connection part 13 of the leadframe project, that is to say adjoin at least the internal space of the recess with a surface, and in particular form at least a part of the bottom area of the radiation exit window 12. For this purpose, a separate cutout 18 is formed in the radiation exit window 12, the base area of which cutout forms the chip connection region 4 and defines the mounting plane for a chip or a wire connection. [0044] The side wall of the radiation exit window, which connects the bottom area of the recess to the outer area of the housing base body 8, is embodied in such a way that it acts as a reflector area for an electromagnetic radiation emitted by the chip 16. It may be planar or concave depending on the desired emission behavior. [0045] The side wall is preferably embodied in such a way that the chip 16 is arranged centrally in the reflector well formed by it, and that it is particularly preferably led essentially as far as the mounting region for the chip on the leadframe 1. This last means that only this mounting region alone essentially represents the entire bottom area of the truncated-cone-like recess. In other words, the bottom area is preferably only as large as is necessary for the chip mounting. In order to achieve this to the greatest possible extent, a cutout 18 for a wire connection 17 from the wire connection part 13 to the chip 16 is provided in the side wall (see FIG. 4). [0046] [0046]FIG. 3 shows a further exemplary embodiment of a housing according to the invention. FIG. 3a illustrates the bottom view, FIG. 3b the side view and FIG. 3c the plan view of the housing. [0047] In contrast to the previously described exemplary embodiments, projections 10 a, 10 b and 10 c are arranged peripherally at the housing, and prevent bending of the leadframe 1 perpendicular to the leadframe plane (see FIGS. 3b and 3 c). The housing is provided in particular for an LED component. For the marking of the cathode connection of the leadframe 1, the housing has, on one side, a bevel 15 and also two separate housing projections 10 a, 10 c, while a single wider projection 10 b is integrally formed opposite. [0048] In this case, the projections 10 a, 10 b and 10 c are arranged in such a way that, in the plan view and in the bottom view, they overlap the deformation or spring elements 3 a, 3 b and thus prevent vertical bending of the deformation elements. [0049] [0049]FIG. 4 perspectively illustrates an exemplary embodiment of a radiation-emitting component according to the invention. The housing of the component corresponds to the previous exemplary embodiment. A radiation-emitting chip 16, for example a semiconductor chip such as a semiconductor LED or a semiconductor laser, is fixed, for example soldered or adhesively bonded by means of an electrically conductive adhesive, on that region of the base area of the radiation exit window 12 which is formed by the chip connection part 14. [0050] On the front side remote from the leadframe 1, the semiconductor chip 16 has a contact area from which a wire connection 17 is led to the wire connection part 13. The oblique side area 11 of the radiation exit window 12 serves as a reflector for a radiation emitted by the semiconductor chip 16 toward the side. [0051] [0051]FIG. 5 shows a multiple arrangement of components according to the invention. A plurality of holes 20 are formed in a carrier 19, for example a circuit board. Furthermore, the carrier has an emission side 21. [0052] A plurality of radiation-emitting components according to the invention are fixed on the side of the carrier opposite to the emission side, in each case a part of the housing body 80 of a radiation-emitting component in accordance with FIG. 4 projecting into one of the holes 20 and the emission direction 24 running through the holes 20. [0053] The connection strips 2 a, 2 b of the respective leadframes of the components lie on the surface of the carrier 19 opposite to the emission side 21. Adhesive bonding connections or soldering connections may serve for fixing the components. On account of the leadframe which is formed in planar fashion and, in particular, has no bends, the space requirement horizontally and vertically is significantly smaller than in the case of components according to the prior art. In particular, the invention enables a partly recessed mounting of the components. [0054] On account of the deformation elements 3 a, 3 b formed for example as spring strips in the leadframe, the leadframe is sufficiently flexible to absorb strains and deformations elastically or plastically without harmful strains being transmitted to the housing or a radiation-emitting chip situated therein. This mounting arrangement is suitable in particular for densely packed flat display modules. [0055] Preferably, the carrier or at least the emission-side surface is embodied such that it is radiation-absorbent, for example blackened, thereby increasing the contrast of the individual radiation-emitting components with respect to the surroundings. This is advantageous particularly in the case of multiple arrangements which are provided as a display apparatus. [0056] [0056]FIG. 6 shows a further multiple arrangement of components according to the invention. In contrast to the preceding multiple arrangement, the multiple arrangement shown in FIG. 6 is suitable in particular as background illumination, for example for a liquid crystal display. [0057] As in the previous exemplary embodiment, radiation-emitting components according to the invention are mounted in partly recessed fashion on a carrier 19. On the emission side, a diffusing plate 22 is arranged downstream of the carrier or the components. Furthermore, the carrier 19 or at least the emission-side surface of the carrier 19 is preferably embodied such that it is uniformly diffusely reflective, for example white. This enables a largely homogeneous backlighting in an extremely flat design. Arranged downstream of the diffusing plate is, for example, an LCD display 23 to be illuminated. [0058] The carrier may be formed both, as described above, rigidly and flexibly, for example in the form of a plastic or a ceramic film, so that a backlighting or display module can be adapted in a simple manner to different forms and advantageously even be mounted at changing areas. [0059] It goes without saying that the explanation of the invention on the basis of the exemplary embodiments shown is not be understood as a restriction of the invention. However, for example, the chip may be mounted, for example adhesively bonded, directly on a chip mounting area of the housing base body 8 and the chip may be electrically connected to the leadframe exclusively by means of wire connections. The chip may equally be mounted on a separate thermal connection embedded in the housing body, and again be electrically connected to the leadframe by means of wire connections. All these embodiments do not depart from the fundamental concept of the present invention. Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS5874748 *Mar 12, 1997Feb 23, 1999Rohm Co., Ltd.Light-emitting diode device and illuminator with light-emitting surface using same* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS7102213 *Sep 5, 2003Sep 5, 2006Osram Opto Semiconductors GmbhLeadframe-based housing, leadframe strip, surface-mounted optoelectronic-component, and production methodUS7414269May 28, 2004Aug 19, 2008Osram Opto Semiconductors GmbhHousing for a radiation-emitting component, method for the production thereof, and radiation-emitting componentUS7677899Mar 16, 2010Young Lighting Technology CorporationLED light source module and LED backlight module using the sameUS9081226 *Oct 16, 2012Jul 14, 2015Samsung Display Co., Ltd.Light-emitting moduleUS20060157828 *Sep 5, 2003Jul 20, 2006Osram Opto Semiconductor GmbhLeadframe - based housing, leadframe strip, surface - mounted optoelectronic -component, and production methodUS20070069227 *May 28, 2004Mar 29, 2007Osram Opto Semiconductors GmbhHousing for a radiation-emitting component, method for the production thereof, and radiation-emitting componentUS20090068856 *Mar 21, 2008Mar 12, 2009Huan-Lian LowLED light source module, manufacturing method thereof and LED backlight module using the sameUS20090212316 *Aug 24, 2006Aug 27, 2009Osram Opto Semiconductors GmbhSurface-mounted optoelectronic semiconductor component and method for the production thereofUS20110317424 *Mar 11, 2010Dec 29, 20113A Technology & Management Ltd.Lighting device and use thereofUS20130258683 *Oct 16, 2012Oct 3, 2013Samsung Display Co., Ltd.Light-emitting moduleUS20140008692 *Jul 1, 2013Jan 9, 2014Nichia CorporationMolded package for light emitting device and light emitting device using the sameDE102014112540A1 *Sep 1, 2014Mar 3, 2016Osram Opto Semiconductors GmbhOptoelektronisches Bauteil* Cited by examinerClassifications U.S. Classification257/666, 257/E33.072International ClassificationH01L33/48, H01L33/62, H01L33/60Cooperative ClassificationH01L2924/12041, H01L33/483, H01L33/62, H01L33/60, H01L2924/0002European ClassificationH01L33/62, H01L33/60Legal EventsDateCodeEventDescriptionAug 23, 2004ASAssignmentOwner name: OSRAM OPTO SEMICONDUCTOR GMBH, GERMANYFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ARNDT, KARLHEINZ;BOGNER, GEORG;WAITL, GUNTER;REEL/FRAME:015875/0626;SIGNING DATES FROM 20040624 TO 20040630Aug 11, 2010FPAYFee paymentYear of fee payment: 4Sep 11, 2014FPAYFee paymentYear of fee payment: 8RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services