Source: https://patents.google.com/patent/EP1095411B1/en
Timestamp: 2020-01-24 02:19:16
Document Index: 85317956

Matched Legal Cases: ['art 102', 'art 104', 'art 105', 'art 102', 'arts 104', 'art 110', 'art 102', 'art 102', 'art 105', 'art 110', 'art 110', 'art 110', 'art 110', 'art 2', 'art 5', 'art 2', 'art 2', 'art 5', 'arts 4', 'art 10', 'art 10', 'art 2', 'art 10', 'art 2', 'art 2', 'arts 4', 'art 2', 'arts 4', 'art 2', 'arts 4', 'art 2', 'arts 4']

EP1095411B1 - Radiation-emitting and/or -receiving component - Google Patents
Radiation-emitting and/or -receiving component Download PDF
EP1095411B1
EP1095411B1 EP99942731A EP99942731A EP1095411B1 EP 1095411 B1 EP1095411 B1 EP 1095411B1 EP 99942731 A EP99942731 A EP 99942731A EP 99942731 A EP99942731 A EP 99942731A EP 1095411 B1 EP1095411 B1 EP 1095411B1
EP99942731A
EP1095411A1 (en
1998-06-30 Priority to DE19829197 priority
1999-06-30 Application filed by Osram Opto Semiconductors GmbH filed Critical Osram Opto Semiconductors GmbH
2001-05-02 Publication of EP1095411A1 publication Critical patent/EP1095411A1/en
2009-01-14 Publication of EP1095411B1 publication Critical patent/EP1095411B1/en
The invention relates to a component which can emit and/or receive radiation. A radiation-emitting and/or receiving optoelectronic chip (1) is fixed on a chip-supporting part (2) of an electrical lead frame (3) and partial areas of the chip-supporting part (2) and of external electrical connection parts (4, 5) are surrounded by a radiopaque base body (8). Said base body has a trough (9) in which the chip (1) is situated and which is filled with a transparent window part (10). According to the invention, the chip-supporting part (2) is completely surrounded by the radiopaque base body (8) up to the area (6) where the chip (1) is fixed and the external electrical connection parts (4, 5) are completely surrounded by the radiopaque base body (8) up to the areas (7) where one or more electrical connection leads (11) to the chip (1) are fixed.
The invention relates to a radiation-emitting and / or -empfangendes device according to the preamble of claim 1. The invention relates in particular to such semiconductor light-emitting diodes (LED) components.
Such a radiation-emitting and / or -empfangendes device is for example from the Publication "Siemens SMT-TOPLED for surface mounting", Siemens Components 26 (1991) Issue 4, pages 147-149 known. At this in FIG. 4 schematically illustrated known surface mountable light emitting diode (LED), a radiation emitting semiconductor chip 101 is mounted on a flat chip carrier portion 102 of a planar lead frame 103 made of metal. The lead frame 103 is composed of the chip carrier part 102 with a first external electrical connection part 104 and a second external electrical connection part 105 arranged electrically therefrom with a bonding region 107 for bonding an electrical connection wire 111 for the semiconductor chip 101. The chip carrier part 102 with the semiconductor chip 101, and portions of the two external electrical connection parts 104,105 are surrounded by a plastic sheath 120, which is composed of a radiopaque plastic base body 108 with a reflector trough 109 and a radiation-permeable plastic window part 110 filling this. The plastic base body 108 consists of a thermoplastic with a high diffuse reflectance of about 90%.
The reflector well 109 has a bottom surface 113 lying parallel to a mounting surface of the chip carrier part 102 and a side wall 112 inclined thereto at an obtuse angle to the bottom surface 113, so that it acts as a reflector for the radiation emitted by the semiconductor chip 101 acts. The bottom surface 113 is in the same plane as the surface of the planar lead frame 103 facing the semiconductor chip 101, so that the bottom of the reflector is largely formed by the lead frame surface. The chip carrier part 102 and the second external electrical connection part 105 consequently have relatively large interfaces to the radiation-transmissive plastic window part 110.
A particular problem of this known surface-mounted light-emitting diode is that at the interfaces between the lead frame 103 and the radiation-transmissive window part 110 due to the different thermal expansion coefficients of the lead frame 103, in the case of strong temperature fluctuations in the component or its surroundings (eg in an automobile). which usually consists of a metal, and the plastic window part 110, usually a transparent epoxy resin, so great shear forces occur that it often comes to a detachment of the window part 110 from the lead frame 103. The resulting gap between the lead frame 103 and the plastic window portion 110 causes a large portion of the emitted from the semiconductor chip 101 electromagnetic radiation is absorbed in the device due to multiple reflections and thus lost.
In addition, the gap formation from the gap between the lead frame 103 and the plastic window portion 110 may continue to the outer surface of the plastic sheath 120, which may result in the penetration of moisture to the semiconductor chip 101 and its damage.
Furthermore, from the DE 195 36 454 A1 an optoelectronic device described, which has in principle the structure described in the above document. Additionally forms at the chip component part explained in this disclosure, a trough in which the chip is arranged and adjacent the entire inner surface of the window part. Consequently, the problems described above can occur here as well.
The invention has for its object to develop a strahlungaussendendes and / or -empfangendes component of the type mentioned, in which the risk of delamination at the interface between the window part and the lead frame is reduced.
This object is achieved by a radiation-emitting and / or receiving component with the features of claim 1. Further developments of the device according to the invention are the subject of the dependent claims 2 to 4.
According to the invention, the radiation-impermeable base body in the trough from a bottom surface of the trough toward the chip carrier part has a first window in which the chip is connected to the chip carrier part. Furthermore, the trough from the bottom surface of at least a second window toward or to the external electrical connection parts down, in which the electrical connection line (s) are connected to the chip to the lead frame. The particular advantage of this development is that the basic body can be produced in a simple manner with a correspondingly shaped injection molding tool.
In the cladding, the chip carrier part is advantageously up to the surface region on which the semiconductor chip is attached, and the external electrical connection parts except for the surface region (s) on which or one or more electrical connection lines are attached to the chip, completely enclosed by the radiopaque body.
Consequently, in a device according to the invention, the interface between the radiation-transmissive window part and the lead frame is reduced to a minimum. Consequently, significantly lower mechanical shear forces occur at this interface compared to the known component in the case of temperature fluctuations, which leads to a reduction in the danger of delamination.
In an advantageous embodiment of the radiation-emitting and / or receiving component, the chip carrier part has and the external electrical terminals in the areas in which the chip or the electrical connection line (s) are attached, in each case a crank to the tub, such that portions of the surfaces of the chip carrier part and the external electrical connection parts lie in the same plane a bottom surface of the tub or protrude into the tub. In this development, it is advantageous that for the production of conventional, used for the production of the above-described known SMT TOPLED components injection molding tools can be used, and that for various lead frame designs z. B. for different arrangements of the semiconductor chip and the electrical connection lines always the same injection molding tools can be used.
It is furthermore particularly advantageous that in the component according to the invention, the size of the metal surface of the leadframe adjoining the window part is reduced to a minimum, resulting in an improved overall reflectivity of the trough. In fact, the metal of the lead frame generally has a lower reflectance than the material of the base body, whereby the radiation emitted by the chip is more strongly absorbed there. For this reason, relatively large dark areas can be seen in the reflector during operation in the reflector in the case of the known components.
Advantageously, the base body to increase the light output from the device consists of a material having a diffuse reflectance of more than 80%, preferably of filled synthetic resin.
The invention will be described with reference to 2 embodiments in conjunction with the FIGS. 1 to 4 explained in more detail. Show it:
FIG. 1 a schematic representation of a vertical section through a first embodiment,
FIG. 2 a schematic representation of a plan view of the embodiment of FIG. 1 .
FIG. 3 a schematic representation of a vertical section through a second embodiment,
FIG. 4 a schematic representation of a radiation emitting and / or receiving semiconductor device according to the prior art (explained above).
In the figures, the same and equivalent components of the various embodiments are always provided with the same reference numerals.
In the device of Figures 1 and 2 it is a Surface Mount Technology (SMT) light emitting diode device. This is composed of an electrical lead frame 3 (eg consisting of a metal) with a chip carrier part 2, a first 4 and a second external electrical connection part 5, a radiation-emitting semiconductor chip 1 (LED chip) mounted on the chip carrier part 2, a connecting conductor 11 (bonding wire) and a cuboid plastic sheath 20th
The semiconductor chip 1 has a contact metallization 17, 18 on its front side and on its rear side. The contact metallization 18 on the rear side of the semiconductor chip 1 is, for example, by means of a metallic solder or an electrically conductive adhesive with the chip carrier part 2 and the contact metallization 17 on the front side of the semiconductor chip 1 by means of a bonding wire 11, the z. B. made of gold or other suitable metallic material, electrically conductively connected to the second external electrical connection part 5.
The plastic sheath 20 consists of a radiopaque light-reflecting plastic base body 8, from which protrude the external electrical connection parts 4,5, and a radiation-permeable plastic window part 10. The plastic base body 8 has a reflector trough 9, in which the semiconductor chip. 1 is arranged and that of the plastic window part 10 is filled. The reflector trough 9 has a bottom surface 13 lying parallel to a mounting surface of the chip carrier part 2 and a side wall 12 inclined thereto at an obtuse angle to the bottom surface 13, so that it acts as a reflector for the radiation emitted by the semiconductor chip 1.
The plastic base body 8 and the plastic window part 10 preferably consist of a resin or thermoplastic filled with reflection-increasing material or of a transparent synthetic resin or polycarbonate. Suitable fillers for synthetic resins are, for example, metal powders, metal oxides, metal carbonates or metal silicates.
The chip carrier part 2 is substantially up to those surface region 6 on which the semiconductor chip 1 z. B. is attached by chip bonding and the external electrical connection parts are 4.5 except for those or those surface area / e 7, on or on which one or more electrical connection lines 11 to the semiconductor chip 1 z. B. are fixed by wire bonding, completely enclosed in the plastic sheath 20 of the radiopaque plastic base body 8. This is achieved in this particularly preferred embodiment in that the radiopaque plastic base body 8 in the trough 9 has a first window 6 towards the chip carrier part 2 and at least one second window 7 towards or to the external electrical connection parts 4, 5 in which the semiconductor chip 1 or the electrical connection line (s) 11 to the semiconductor chip 1 are connected to the lead frame 3.
This in FIG. 3 embodiment shown differs from that of Figures 1 and 2 Essentially, no windows 6 and 7 are provided for the chip carrier part 2 or the connection parts 4, 5. In place of the window 6,7 are here on the chip carrier part 2 and to the external electrical Connecting parts 4.5 in the areas in which the semiconductor chip 1 and the electrical (s) connecting line (s) 11 are connected to the lead frame 3, respectively a crank 14.15 provided to the trough 9, such that portions of the surfaces of the Chip carrier part 2 and the external electrical connection parts 4,5 in the same plane as a bottom surface 13 of the trough 9. Alternatively, the cranked portions may protrude into the trough 9.
The explanation of the invention with reference to these embodiments is of course not to be understood as limiting the invention to these. Rather, the invention can also be used in photodiode, phototransistor components or polymer light-emitting diode components.
Radiation transmitting and/or receiving component, in which at least one chip (1) which transmits and/or receives electromagnetic radiation is mounted on at least one chip mount part (2) of an electrical leadframe (3) which has at least two external electrical connecting parts (4, 5) which are electrically conductively connected to the chip (1), and
in which the chip mount part (2) and sub areas of the external electrical connecting parts (4, 5) are surrounded by a sheath (20) which has a base body (8) through which radiation cannot pass and a window part (10) through which radiation can pass, and from which the external electrical connecting parts (4, 5) project,
with the base body (8) through which radiation cannot pass having a well (9) in which the semiconductor chip (1) is arranged and in or above which the window part (10) is located,
- from a bottom surface of the well (9), a first window (6) is formed towards the chip mount part (2), in which window (6) the chip (1) is mounted on the chip mount part (2) and
- from a bottom surface of the well (9), at least one second window (7) is formed to at least one external electrical connecting part (4, 5) in which at least one electrical connection line (11) to the chip (1) is connected to the at least one external electrical connecting part (4, 5),
- in the area of the bottom surface of the well (9) as well, the chip mount part (2), except for the surface area which is exposed through the first window (6), and on which the chip (1) is mounted, and the external electrical connecting parts (4, 5), except for the surface area which is exposed through the second window (7) and on which the at least one electrical connection line to the chip is mounted, are completely covered by the base body through which radiation cannot pass.
Radiation transmitting and/or receiving component according to Claim 1, characterized in that at least the chip mount part (2) or at least one of the external electrical connecting parts (4, 5) has a crank (14, 15) towards the well (9) in the area of the respectively associated window (6, 7), such that a sub area of the surface of the chip mount part (2) or of the external electrical connecting part (4, 5) lies on the same plane as the bottom surface (13) of the well (9), or projects into the well (9).
Radiation transmitting and/or receiving component according to Claim 1 or 2, characterized in that the well (9) is in the form of a reflector well.
Radiation transmitting and/or receiving component according to one of Claims 1 to 3, characterized in that the base body (8) is composed of a material with a diffuse reflectance of more than 80%.
EP99942731A 1998-06-30 1999-06-30 Radiation-emitting and/or -receiving component Expired - Lifetime EP1095411B1 (en)
EP1095411A1 EP1095411A1 (en) 2001-05-02
EP1095411B1 true EP1095411B1 (en) 2009-01-14
EP99942731A Expired - Lifetime EP1095411B1 (en) 1998-06-30 1999-06-30 Radiation-emitting and/or -receiving component
JP3768864B2 (en) * 2001-11-26 2006-04-19 シチズン電子株式会社 Surface mount type light emitting diode and manufacturing method thereof
JP4330835B2 (en) * 2001-12-28 2009-09-16 ミツミ電機株式会社 Optical pickup device
DE10261675B4 (en) * 2002-12-31 2013-08-14 Osram Opto Semiconductors Gmbh Optoelectronic component with radiation-permeable electrical contact layer
CN100499099C (en) * 2003-01-16 2009-06-10 松下电器产业株式会社 Lead frame for a semiconductor device
CN100420048C (en) * 2003-03-14 2008-09-17 住友电气工业株式会社 Semiconductor device
JP5358104B2 (en) * 2008-02-25 2013-12-04 豊田合成株式会社 Light emitting device
DE102009058421A1 (en) 2009-12-16 2011-06-22 OSRAM Opto Semiconductors GmbH, 93055 Method for producing a housing for an optoelectronic semiconductor component, housing and optoelectronic semiconductor component
JP5535750B2 (en) 2010-04-30 2014-07-02 ローム株式会社 Light emitting element module
JPWO2011136356A1 (en) * 2010-04-30 2013-07-22 ローム株式会社 LED module
DE102010046254A1 (en) * 2010-09-22 2012-04-19 Osram Opto Semiconductors Gmbh Optoelectronic semiconductor component
CN103392242B (en) * 2011-02-28 2017-02-22 日亚化学工业株式会社 Light emitting device
DE102013202910A1 (en) * 2013-02-22 2014-09-25 Osram Opto Semiconductors Gmbh Optoelectronic component and method for its production
JP5796649B2 (en) * 2014-03-06 2015-10-21 日亜化学工業株式会社 Optical semiconductor device and manufacturing method thereof
JP6471416B2 (en) * 2014-04-23 2019-02-20 株式会社カネカ Resin molding for optical semiconductor device, optical semiconductor package, and optical semiconductor device
1999-06-30 JP JP2000558566A patent/JP3682230B2/en not_active Expired - Lifetime
1999-06-30 CN CNB998033502A patent/CN1160802C/en not_active IP Right Cessation
1999-06-30 EP EP99942731A patent/EP1095411B1/en not_active Expired - Lifetime
1999-06-30 DE DE59914949A patent/DE59914949D1/en not_active Expired - Lifetime
2000-12-29 US US09/754,043 patent/US6624491B2/en not_active Expired - Lifetime
2003-07-09 US US10/616,070 patent/US6858879B2/en not_active Expired - Lifetime
2004-10-04 US US10/957,927 patent/US7105862B2/en not_active Expired - Lifetime
2006-02-02 US US11/345,756 patent/US7138301B2/en not_active Expired - Lifetime
2006-10-23 US US11/584,956 patent/US7368329B2/en not_active Expired - Lifetime
2008-03-26 US US12/055,863 patent/US7696590B2/en not_active Expired - Lifetime
US20060138442A1 (en) 2006-06-29
KR101176755B1 (en) 2012-08-23 Semiconductor component emitting and/or receiving electromagnetic radiation, and housing base for such a component
JP2006519481A (en) 2006-08-24 Illumination module and method of manufacturing the illumination module
JP4709487B2 (en) 2011-06-22 Optoelectronic devices
JP2007036295A (en) 2007-02-08 Surface-mountable photoelectric element
Ref document number: 59914949
2019-06-30 REG Reference to a national code