WO2016016302A1 - Herstellung einer vorrichtung mit streifenförmigem leiterrahmen - Google Patents
Herstellung einer vorrichtung mit streifenförmigem leiterrahmen Download PDFInfo
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- WO2016016302A1 WO2016016302A1 PCT/EP2015/067376 EP2015067376W WO2016016302A1 WO 2016016302 A1 WO2016016302 A1 WO 2016016302A1 EP 2015067376 W EP2015067376 W EP 2015067376W WO 2016016302 A1 WO2016016302 A1 WO 2016016302A1
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- WIPO (PCT)
- Prior art keywords
- lead frame
- leadframe
- sections
- semiconductor chips
- structures
- Prior art date
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Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/857—Interconnections, e.g. lead-frames, bond wires or solder balls
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/8506—Containers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/852—Encapsulations
- H10H20/853—Encapsulations characterised by their shape
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W90/00—Package configurations
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/01—Manufacture or treatment
- H10H20/036—Manufacture or treatment of packages
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/01—Manufacture or treatment
- H10H20/036—Manufacture or treatment of packages
- H10H20/0362—Manufacture or treatment of packages of encapsulations
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/01—Manufacture or treatment
- H10H20/036—Manufacture or treatment of packages
- H10H20/0364—Manufacture or treatment of packages of interconnections
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W90/00—Package configurations
- H10W90/701—Package configurations characterised by the relative positions of pads or connectors relative to package parts
- H10W90/751—Package configurations characterised by the relative positions of pads or connectors relative to package parts of bond wires
- H10W90/756—Package configurations characterised by the relative positions of pads or connectors relative to package parts of bond wires between a chip and a stacked lead frame, conducting package substrate or heat sink
Definitions
- the present invention relates to a method for herstel ⁇ len a device and apparatus.
- a linear lighting device generally has light emitting diodes (LED, light emitting diode) with low or medium power, which are arranged on a strip-shaped carrier. Such devices are therefore also referred to as LED strip or LED strip.
- the carrier can be a fle ible ⁇ PCB or a metal core PCB (MCB, Metal Core Board).
- light-emitting diodes also referred to as LED packages
- This usually includes an environmental inject a metallic lead frame having a housing ⁇ body having recesses, a mounting of radiation-emitting diode chips in the recesses on the lead frame, a making electrical connections by wire bonding, a filling of the recesses with a casting compound, and dicing the thus educated ⁇ th composite in the LEDs.
- the light-emitting diodes are arranged by performing a surface mounting (SMT, Surface Mounting Technology) on a support.
- SMT Surface Mounting Technology
- a method for manufacturing a device includes providing a strip-shaped lead frame.
- the leadframe has in a row juxtaposed ladder frame sections and the leadframe sections connecting connecting structures, which each connect two adjacent leadframe sections.
- the method further comprises forming moldings on the leadframe which mechanically interconnect each of two adjacent leadframe sections.
- an arranging of semiconductor chips that is to say unhoused components, takes place on the strip-shaped lead frame. This makes it possible to produce the device in a cost effective manner and with little effort.
- a surface or SMT mounting can be omitted here.
- the strip-shaped lead frame can serve as a carrier of the device.
- connection structure In the lead frame provided all are wire frame portions, which are positioned side by side in a direction of extension or longitudinal ⁇ of the lead frame mechanically interconnected only via the interconnect structures. Each connection structure combines two neighboring ladder frame sections. The mechanical connection allows a simple and reliable handling of the Lei ⁇ terrahmens in the manufacturing process. Due to the connection structures, a falling apart of the lead frame is avoided.
- the device produced by means of the method can furthermore have the conductor frame sections arranged next to one another in a row and thus, like the lead frame, a strip-shaped geometry. Furthermore, the device may be an optoelectronic device for emitting light radiation.
- radiation-emitting semiconductor chips are arranged on the lead frame.
- the radiation-emitting semiconductor chips may be light-emitting diode chips (LED, light-emitting diode).
- LED light-emitting diode
- the produced by the process device can be a linear Leuchtvor ⁇ direction or an LED strip.
- the lead frame used in the method is electrically conductive or metallic.
- the provision of the lead frame may include providing a metallic output layer and patterning the metallic output layer. Include layer in the lead frame with the ladder frame sections and the connection structures.
- the structuring can be done by etching. Also possible is a mechanical structuring, for example by means of punching and / or embossing. Further, after patterning, coating of the lead frame with a metallic coating may be performed, for example by electroplating. Due to the coating, the lead frame may be suitable for soldering and connecting bonding wires. Forming the coating may be considered, for example, when a metallic starting layer of copper is used.
- the interruption of the connections of the leadframe sections realized via the connection structures comprises a removal of the connection structures.
- the short-circuit connections of the leadframe sections can be separated with a high reliability.
- the removal of the bond structures can Ver ⁇ be done in a mechanical way, for example by punching.
- connection structures can be carried out after forming a further mechanical connection of the leadframe sections, that is to say an additional mechanical connection of all the leadframe sections to the connection structures.
- connections of the leadframe sections via the connection structures are dispensable.
- the arranged on the lead frame or respectively on two adjacent lead frame sections moldings over which each adjacent lead frame sections and thus all the lead frame sections are mechanically connected are used.
- the interruption of the realized via the connection structures compounds of the lead frame sections after perform the formation of the moldings can be used as mechanical fasteners to mechanically stabilize the lead frame and hold the lead frame sections together.
- the formation of the shaped bodies on the leadframe can be carried out, for example, with the aid of a forming process (molding process). It is conceivable, for example, transfer molding (transfer molding), injection molding (injection molding) or compression molding (compression molding). This can be a
- the ladder frame is formed with structures for enabling anchoring of the moldings. It is possible, for example, an embodiment of the lead frame with Ausspa ⁇ ments and stepped side edges of lead frame sections. In this way, a reliable fastening of the molded bodies to the leadframe and thus reliable mechanical connections of the leadframe sections can be achieved.
- the shaped bodies formed in the process can serve as housing bodies for the semiconductor chips.
- the shaped bodies are formed with recesses or cavities for receiving the semiconductor chips.
- the semiconductor chips can be protected against external influences.
- the lead frame can be exposed on the front side.
- Each shaped body can be formed each with a single recess. Furthermore, the semiconductor chips can be arranged in the recesses of the shaped bodies on the lead frame after forming the shaped bodies.
- the shaped bodies can be formed in mounting areas on the lead frame, in which also the semiconductor chips can be placed on the lead frame.
- the mounting areas can be provided in the region of the center of the strip-shaped conductor frame and along an extension or longitudinal direction of the leadframe objectionable to one another.
- the recesses or the side walls of the recesses of the moldings can serve as reflectors.
- the recesses or the side walls of the recesses of the moldings can serve as reflectors.
- the recesses of the moldings are filled with a potting compound.
- the accommodated in the recesses of the semiconductor chip may be encapsulated, and are thus reliably protected from externa ⁇ ßeren influences.
- a phosphor-filled encapsulant used com ⁇ men can. In this way, a conversion of (primary) radiation generated by the semiconductor chips can be caused.
- Each shaped body effects a mechanical connection between two adjacent leadframe sections.
- a separating region or a recess may be present between adjacent ladder frame sections, for example, as indicated below, a step-shaped recess.
- it may be considered to form the moldings such that the moldings are also arranged in such recesses between adjacent leadframe sections and close them at these locations. In this way, the recesses of the moldings can be closed on the bottom side, whereby a back-side leakage of the potting compound when introducing the Potting compound in the recesses of the molded body can be prevented.
- Leadframes can also be made electrical connections between the leadframe and semiconductor chips. This can be carried out before or even after interrupting the connections of the leadframe sections realized via the connection structures. In this case, processes such as wire bonding and / or soldering can be used. It is also possible to electrically connect semiconductor chips to one another directly. In this context, further embodiments may also be considered.
- the semiconductor chips may for example comprise two Vordernzokon ⁇ contacts. In this way it is possible to produce electrical connections between semiconductor chips and the lead frame, and also of semiconductor chips with one another, with the aid of bonding wires.
- electrical connections between the lead frame and semiconductor chips are manufactured, so that in a state in which the compounds of the lead frame portions, the semiconductor chips or groups of semi ⁇ semiconductor chip are interrupted over the interconnect structures are electrically connected in series.
- the leadframe sections form part of the series electrical connection after breaking the shorts.
- the semiconductor chips can be arranged on the Lei ⁇ terrahmen for example, that each semiconductor chip, a semiconductor chip is provided on a separate lead frame portion or per each mounting area. In this case, a semiconductor chip in each case to two leadframe sections
- the two lead frame sections can serve as the cathode and anode of the respective semiconductor chip.
- each of the semiconductor chips is accommodated in its own recess of a corresponding shaped body.
- the semiconductor chips each of a group un ⁇ behind the other can be connected electrically, for example in series.
- one group may be electrically connected to two lead frame portions, that is, to the lead frame portion on which the group is located and to an adjacent lead frame portion. In this way, the two lead frame sections can serve as the cathode and anode of the group in question.
- each of the semiconductor chip groups is received in a recess of a corresponding shaped body.
- the lead frame portions of the strip-shaped leadframe as cathode and anode and cathode surface and anode surface for semiconductor chips or groups of semiconductor chips ⁇ can be used. If the compound structures of Leiterrah- are mens intact and not broken, all Ka ⁇ thoden- and anode surfaces are electrically shorted. By breaking the connections of the leadframe sections realized via the connection structures, such short-circuit connections are canceled.
- Such components can each be assigned to a semiconductor be associated with a chip or a semiconductor chip group. Also, such components may, for example, electrically connected in parallel with the respective semiconductor chips or semiconductor chip groups, and be received in the recesses of the associated form body.
- connection structures of the provided leadframe are arranged between adjacent leadframe sections and on opposite longitudinal sides of the leadframe. In this way, a simple interruption of realized via the connection structures connections of the leadframe sections is possible.
- the connection structures can be realized in the form of webs or in the form of connecting webs.
- connection structures are arranged on the longitudinal sides of the leadframe between adjacent leadframe sections.
- the connec ⁇ tion structures can be realized here relatively small or with a small width. In this way, a simple interruption of the connections of the leadframe sections realized via the connection structures can be promoted.
- the use of a plurality of connection structures at the edge of the leadframe between adjacent leadframe sections enables a high mechanical stability of the leadframe.
- the connecting structures arranged on opposite longitudinal sides are located at matching positions or positions with a matching height relative to a longitudinal direction of the leadframe. As a result, a simple severing of the realized via the connection structures connections of the leadframe sections can be further promoted.
- juxtaposed leadframe portions of the leadframe may have a stepped shape extending substantially diagonally to the longitudinal direction of the leadframe. This can, notesse ⁇ hen of lead frame sections at the ends of the strip-shaped lead frame, apply to all of the lead frame sections.
- the end-side leadframe sections may be substantially triangular.
- the prepared lead frame may further be such workedbil ⁇ det that in the region of the ends of the stepped off the disposed at opposite longitudinal sides of the lead frame interconnection structures connecting savings.
- the abovementioned mounting areas for the molded bodies and semiconductor chips can be provided in the region of the stepped recesses and thus at the transition between adjacent leadframe sections separated by the stepped recesses.
- the step-shaped recesses may extend along a longitudinal direction of the lead frame.
- a ladder frame section disposed between two ladder frame sections on a longitudinal side of the ladder frame has at least one connection structure with one of the two ladder frame sections and a longitudinal side opposite thereto and a matching position over at least one of a longitudinal direction of the ladder frame Connecting structure connected to the other of the two lead frame sections.
- This structure can apply to all of thenatidomenab ⁇ sections except for lead frame sections at the ends of the strip-shaped lead frame. It is possible to shorten the length of the by the method gefer ⁇ saturated strip-like device subsequently in a flexible manner and to divide the device in a flexible manner in several shorter devices.
- the device or the leadframe is severed at one or more points, so that shorter parts of the device are present, which may have a smaller number of semiconductor chips (or only one semiconductor chip).
- This procedure may, for example, be considered with regard to an embodiment of the device in the form of a linear lighting device with radiation-emitting semiconductor chips.
- the semiconductor chips or groups of semiconductor chips, as in the previously undivided device may be electrically connected in series.
- the flexible cutting can form ⁇ as at opposite longitudinal sides and with respect to the longitudinal direction at matching positions reasonable associated connecting structures, which stepped recesses or the step shape of the lead frame portions are irrit etc. be ⁇ by the above-mentioned execution.
- the device can be severed along one or more separation lines.
- the separating lines can run perpendicular to a longitudinal direction of the conductor frame or the lighting device.
- the dividing lines may be provided in areas where previously lead frame portions of the lead frame were connected by Verbin ⁇ making structures. Separation is therefore no longer required in these areas. When severing a lead frame section along a dividing line by ⁇ separates or halved.
- One possible example of functional areas that can be characterized with such recesses are the above-mentioned mounting areas for moldings and semiconductor chips.
- a mounting area one or more semiconductor chips may be arranged on the lead frame.
- recesses marking the mounting areas for anchoring the shaped bodies it is also possible to use recesses marking the mounting areas for anchoring the shaped bodies, and to introduce the shaped bodies or material of the shaped bodies into such recesses.
- connection element can be Asbil ⁇ det, for example, to connect a lead frame section with an electrical line or a cable.
- Also about the insulating Layer may be provided a further mechanical connection of all the lead frame portions, so an additional to the kausstruktu ⁇ ren the leadframe mechanical connection. In this embodiment, therefore, it may be considered to perform the breaking of the connections of the lead frame sections via the connection patterns after the formation of the insulating layer.
- a device is proposed.
- the device is manufactured according to the method described above or according to one or more of the above-described embodiments of the method.
- the device has a strip-shaped lead frame arranged in a row next to each other
- the device furthermore has shaped bodies arranged on the leadframe, which mechanically connect two adjacent leadframe sections in each case.
- the device further comprises semiconductor chips arranged on the leadframe.
- the moldings can provide a mechanical cohesion of all leadframe sections.
- a connection of the lead frame sections via the material of the lead frame is due to the severing of the short ⁇ circuit connections, this not (more) before.
- other embodiments, features, and details mentioned above with respect to the method may be similarly applied to the device.
- the device may be a linear Leuchtvor ⁇ device with radiation-emitting semiconductor chips and LED chips.
- the shaped bodies Have recesses in which the semiconductor chips are arranged.
- the recesses may be filled with a potting material.
- the semiconductor chips or groups of semi ⁇ semiconductor chip may be electrically connected in series, the lead frame portions form part of the series connection. There may be stepped recesses between the leadframe sections.
- Figure 1 is a MaterialsSichtsdargna a strip-shaped lead frame for a linear lighting device, which in a series juxtaposed ladder frame sections and connecting structures in the region of opposite longitudinal sides of the lead frame has, over which Benach ⁇ disclosed lead frame sections are connected;
- Figure 2 is a MaterialsSichtsdargna the linear lighting device, in which the connection structures of the lead frame removed and the lead frame sections are connected me ⁇ chanically via moldings;
- Figure 3 is a plan view of a section of the Lei ⁇ terrahmens;
- FIG. 4 shows a further view of a section of the leadframe;
- FIG. 5 is a greatly simplified top view corresponding to FIG. 4, in which the connection of the leadframe sections via the connection structures is illustrated;
- FIG. 6 is an elevational view of the ladder frame in the region of the ends of the ladder frame
- Figure 7 is a MaterialsSichtsdarwolf a section of the Lei ⁇ terrahmens, wherein moldings are formed with recesses in Montagebe ⁇ rich on the lead frame, which mechanically connect adjacent ladder frame sections;
- FIGS 8, 9 are enlarged detail views of the lead frame in a mounting area before and after forming a molded body
- Figures 10, 11 different sectional views of the Lei ⁇ terrahmens with a molded body
- FIG. 12 is a perspective view of a section of the conductor frame, wherein semiconductor chips are arranged on the lead frame in the recesses of the molded bodies and bonding wire connections are made;
- FIG. 13 is an enlarged perspective view of the lead frame in a mounting area to illustrate semiconductor chips received in a recess of a molded body
- Figure 14 is a AufSichtsdarwolf a section of the Lei ⁇ terrahmens, wherein recesses of the moldings are filled with a potting compound;
- Figures 15 and 16 are different sectional views of the lead frame with a molded body, the recess is filled with the potting compound;
- FIG. 17 is an elevational view of a detail of FIG.
- FIG. 18 is a perspective view of a detail of FIG.
- Lighting device in which an electrical current flow occurring during operation of the lighting device is indicated schematically;
- Figure 20 is a Figure 19 corresponding to highly simplified ⁇ visual representation;
- FIG. 21 is a perspective view of a section of the lighting device in which possible dividing lines for cutting through the lighting device are indicated.
- Light radiation formed lighting device 100 has such a structure that a flexible shortening of the front ⁇ direction 100 and a flexible division of the device 100 into a plurality of shorter sections is possible.
- a strip-shaped lead frame 110 is provided, on which radiation-emitting semiconductor chips 170 are arranged and, in addition, hearing-impaired housing or packages are formed.
- the conductor ⁇ frame 110 thus serves as a support of the lighting device 100. This approach makes it possible to carry out the production of the lighting device 100 with little effort and at low cost.
- FIG. 1 shows a top view of a metallic leadframe 110 provided for producing a linear luminous device 100.
- the leadframe 110 is strip-shaped and has a plurality of leadframe sections 120 arranged side by side in a row and connecting structures 150 connecting the leadframe sections 120.
- a longitudinal direction 200 of the lead frame 110 along which the lead frame portions 120 are adjacent to each other net angeord- is angedeu ⁇ tet in Figure 1 by means of a double arrow.
- the interconnect structures 150 of the leadframe 110 each connect two adjacent leadframe sections 120 such that all leadframe sections 120 are interconnected.
- the connection structures 150 are located in connection regions 115 which are provided on the edge of the leadframe 110 or in the region of opposite longitudinal sides 111, 112 of the leadframe 110 which extend in the longitudinal direction 200.
- the leadframe 110 has three connection structures 150, as also shown in the detail views of FIGS. 3, 4.
- the connection structures 150 which in each case see two adjacent lead frame sections 120 are located and connect, are web-shaped and have a small width.
- the connection ⁇ structures 150 are referred to as connecting webs 150.
- the connecting regions 115 present on the opposite longitudinal sides 111, 112 and the associated connecting webs 150 are located, in relation to the longitudinal direction 200 of the leadframe 110, respectively at matching positions or positions with a corresponding height (compare FIGS. 1, 4).
- Providing the metallic lead frame 110 with the lead frame portions 120 and the tie bars 150 may include providing a metallic output layer, such as copper, and patterning it into the lead frame 110.
- the structuring of the starting layer can be done, for example, by etching. After patterning, further coating of the lead frame 110 with a metallic coating may be performed.
- the ladder frame sections 120 are mechanically connected in the region of the longitudinal sides 111, 112 via the connecting webs 150 arranged between the ladder frame sections 120.
- the connection ⁇ webs 150 provide sufficient mechanical stability of the lead frame 110, so that a simple and reliable handling of the lead frame 110 in the manufacture of the lighting device 100 is possible. Due to the mechanical connection, a falling apart of the lead frame 110 is avoided.
- the connecting webs 150 By the connecting webs 150, the Porterrahmenabschnit ⁇ te 120, which serve in the lighting device 100 as cathodes and anodes for semiconductor chips 170, connected not only mechanically but also electrically in a direct manner and thereby shorted. In the course of the method, it is therefore provided to separate the connections of the leadframe sections 120 realized via the connecting webs 150 and thus the short-circuit connections.
- the Connecting webs 150 are removed, as shown in the detail illustration of FIG. 17 and in the top view of the lighting device of FIG. 2 manufactured according to the method. After interrupting the short-circuit connections, the lighting device 100 can be operated electrically to emit light radiation.
- next steps are performed in addition to the interruption of the short-circuit connections. This includes a training of
- Such Kom ⁇ components 160, 170 are arranged in mounting regions 140 on the leadframe 110 which spaced around the center of the strip-shaped lead frame 110 and along the longitudinal direction 200 of the lead frame 110 to each other Pre ⁇ are seen (see Figures 1, 2 and 12).
- the molded body 160 serving as a housing body for the semi-conductor chips 170 and respectively cause a mechanical Verbin ⁇ dung two adjacent lead frame portions 120.
- the shaped bodies can be used 160 as a mechanical Verbin ⁇ manure elements, which, like the connection ⁇ structures 150 of the Lead frame 110 can provide a mechanical cohesion of all the lead frame sections 120 of the Lei ⁇ terrahmens 110.
- the connections of the leadframe sections 120 over the interconnect structures 150 are dispensable, and therefore can be removed as noted above to effect the electrical separation of the cathodes and anodes.
- Figure 5 shows a view corresponding to Figure 4, greatly ver ⁇ simplified fragmentary view of the lead frame 110 in which the gradually-shaped extending recesses 131 (with increased width) and extending 131 subsequent connection regions are illustrated 115 schematically at the ends of the recesses.
- the leadframe portions 120 are highlighted for discrimination by means of different hatching.
- the wire frame 110 and the lead frame portions 120 have to ⁇ addition to those stepped recesses 131 further nienförmig arranged recesses 132 li- (cf. FIG. 4), which will be discussed in more detail below.
- Figure 5 shows that the lead frame portions shown and arranged side by side 120, a substantially exhibit due to the both sides of the lead frame portions 120 present stu ⁇ fenförmigen recesses 131 diagonally to the longitudinal direction 200 of the lead frame 110 extending step shape. Further, a disposed between two lead frame portions 120 lead frame portion 120 respectively on the longitudinal side 111 of the lead frame 110 via a plurality of connecting bars 150 with one of the two lead frames ⁇ portions 120 (each of which arranged at the right portion 120 shown in FIG 5) and the opposite thereto Lijnssei ⁇ 112 and with respect to the longitudinal direction 200 of the leadframe 110 at a coincident position over a plurality of connecting webs 150 with the other of the two lead frame tabs.
- the ends of the provided lead frame 110 are shown in fragmentary form in FIG.
- the two end-side leadframe sections 120 which are highlighted by hatching in FIG. 6, are substantially triangular in shape and can be considered as "halved" leadframe sections 120 which, when combined, can form a diagonally extending "whole" leadframe section 120.
- the end-side leadframe sections 120 are connected only on one of the longitudinal sides 111 or 112 to an adjacent leadframe section 120 via a plurality of connecting webs 150.
- the ladder frame 110 provided has, in addition to the recesses 131 separating stepwise in the plan view and adjacent ladder frame sections 120, a plurality of further cut-outs 132 arranged in a line or in the form of dashed lines, as shown in FIGS. 3, 4 , These recesses 132, which are also partially connected to the stepped recesses 131 or emanate from the recesses 131 (cf., for example, the area 140 shown in FIG. 8), serve to identify functional areas of the leadframe 110.
- the mounting regions 140 include the assembly regions 140 present in the center of the leadframe 110 along the longitudinal direction 200.
- the mounting regions 140 are highlighted in the form of dashed lines on the basis of rectangular recesses or square encircling recesses 132.
- the mounting areas 140 are each on two adjacent leadframe sections 120 and at the junction of two adjacent leadframe sections 120 provided, which are separated by a corresponding step-shaped recess 131.
- the step-shaped recesses 131 thus also extend through the mounting regions 140 highlighted using the recesses 132, as is indicated schematically in FIG. 5 (see also FIG. 8). At these points, the stepped recesses run
- test terminal areas 141, 142 are rectangular test terminal areas 141, 142, at which the lead frame 110 and the manufactured device 100 can be kon ⁇ taktiert for test purposes (see Figures 3, 4).
- the areas 141 cathode test port areas, and the Be ⁇ rich 142 anode test port areas can be.
- the lead frame 110 is further formed with circular holes 123 located near the test terminal portions 141 (see FIGS. 3, 4). About the holes 123 is the
- 132 with the help of the recesses (and in part of the recesses 131) are rectangular-shaped terminal portions 143 also forth ⁇ pre-stressed (see FIGS. 3, 4).
- connecting elements can be mounted at these points for connection to an electrical line or a cable, for example by means of soldering.
- the connection areas 143 present at the two ends can be used in each case.
- the finished lighting device 100 may or emanating from this device with electrical ⁇ shear energy to be supplied.
- the lead frame 110 can optionally be provided with an insulating or dielectric layer (not shown) on the front side.
- the holes 123, the areas 140, 141, 142, 143 and the connecting portions 115 can be freely supported ⁇ th.
- the moldings 160 serving as housings are formed in the mounting areas 140 on the lead frame 110, as shown in the sectional view of FIG.
- the molded bodies 160 are each arranged on two adjacent Porterrahmenab ⁇ sections 120, whereby these conductor sections 120 and thus all the lead frame sections 120 via the form ⁇ body 160 are mechanically connected (see also Figure 18).
- Figures 8, 9 show an enlarged sectional representation in the region of a mounting portion 140 before and after the Ausbil ⁇ a corresponding molded body 160.
- the figures 10, 11 show different sectional views of Figure 9, with the sectional planes refer to the indicated in figure 9 cut lines ,
- the moldings 160 have a rectangular or square outer contour. Furthermore, the molded bodies 160 each have a circular recess or cavity 161, so that the leadframe 110 or the two leadframe sections 120 respectively associated with a shaped body 160 are exposed on the front side within the cavity 161.
- the cavities 161 have an inwardly directed, circular ⁇ shaped circumferential side wall 162 which in cross-section extends obliquely to the lead frame 110 (see Figures 10, 11). In this way the moldings can act as reflectors 160 ⁇ tors.
- the shaped bodies 160 are furthermore designed in such a way that the recesses 131 which are step-shaped in plan view are closed in the mounting areas 140.
- the molded bodies 160 are formed with partial sections 163 which correspondingly fill the recesses 131 in this area (compare FIGS. 9, 11). As a result, the cavities 161 of the moldings 160 are closed or sealed on the bottom side.
- the lead frame 110 and the moldings 160 are formed so that reliable anchoring of the moldings 160 to the lead frame 110 is possible.
- the molded bodies 160 and / or the material of the molded bodies 160 are arranged not only in the recesses 131 but also in the recesses 132 which characterize the mounting areas 140 and extend in a rectangular pattern (compare FIGS. 8, 9, 11).
- the leadframe sections 120 are formed in the region of the recesses 131, 132 with step-shaped side edges 127 for anchoring the shaped bodies 160, as shown in FIG. 11.
- the lead frame 110 on back recesses or grooves 126, into which material of the mold body introduced for anchoring the same ⁇ tion 160 (see FIG. 10).
- the formation of the moldings 160 on the leadframe 110 is performed by means of a forming process.
- an electrically insulating molding or molding compound is used.
- the molding compound may have a white color.
- the molding compound may be a plastic material or comprise a plastic material.
- the molding process can be a transfer molding process, an injection molding process or a molding process. _ n
- radiation-emitting semiconductor chips 170 are arranged in the cavities 161 of the mold bodies 160 on the ladder frame 110, as shown in the detail views of FIGS. 12, 13.
- a group of two semiconductor chips 170 is positioned in each mounting area 140 or in each cavity 161.
- the radiation-emitting semiconductor chips 170 may, in particular, be light-emitting diode chips for generating a light radiation.
- the manufactured lighting device 100 may be an LED strip.
- the semiconductor or light emitting diode chip 170 may be prepared in a manner known per se and components such as a semiconductor layer sequence with an active zone for Strah ⁇ lung generation have. Further, the semiconductor chip 170 have two front-side contacts via which the half ⁇ semiconductor chip 170 are supplied with electrical energy Kgs ⁇ NEN.
- the semiconductor chips 170 may be, for example, Ver ⁇ application of an adhesive or other material attached such as a brazing material on the lead frame 110th
- protective diodes 172 assigned to the individual semiconductor chip groups are arranged in the cavities 161 of the molded bodies 160 on the leadframe 110, as likewise shown in FIGS. 12, 13.
- the protective diodes 172 are positioned on the lead frame portions 120 which are adjacent to the semiconductor chip 170 carrying Lei ⁇ terrahmenabêten 120.
- the protection diodes 170 which serve to protect against electrostatic discharge, also referred to as ESD protection diodes (Electro Static Dischar- ge).
- the protection diodes 172 have a front-side contact and a rear-side contact. Via the backside contact the protection diodes 172 are used, for example a solder or an electrically conductive adhesive, mounted on the lead frame 110.
- electrical connections in the form of bonding wires 175 are produced.
- the radiation-emitting semiconductor chips 170 in the individual semiconductor chip groups are electrically connected in series with each other, and the semiconductor chip groups are electrically connected in series with the associated lead frame sections 120.
- the protective diodes 175 are connected in parallel or antiparallel to the associated semiconductor chip groups.
- the bonding wires 175 are connected to the front-side contacts of the radiation-emitting semiconductor chips 170 and the protective diodes 172, and with the exception of bonding wires 175 for direct connection of semiconductor chips 170, to the lead frame 110.
- one of the two semiconductor chips 170 is connected via a bonding wire 175 to the leadframe section 120 on which the group is located, and the other of the two semiconductor chips 170 is connected via a bonding wire 175 to the adjacent thereto Lei ⁇ terrahmenabites 120th
- the protective diodes 172 are th through bonding wires 175 to the adjacent and corresponding to ⁇ semiconductor chip 170 carrying autismrahmenabschnit- 120 is connected.
- the leadframe section 120 on which there is a group can be located. det, serve as the cathode of this group.
- the other or be ⁇ neighboring leadframe section can in each case as anode, the ⁇ nen.
- a leadframe section 120 can thus serve as a cathode and as an anode for various semiconductor chip groups.
- the cavities 161 of the molded bodies 160 are filled with a potting compound 180, as shown in the plan view of FIG. 14.
- a potting compound 180 As a result, the semiconductor chips 170 and protective diodes 172 arranged inside the cavities 161 and wired are encapsulated, as a result of which the electrodes are reliably protected against external influences.
- the introduction of the potting compound 180 into the cavities 161 can be carried out, for example, with the aid of a dispensing or dosing method.
- the cavities 161 can be filled to the front side of the moldings 160 with the potting compound 180, as shown in the sectional views of Figures 15, 16.
- the associated cutting planes relate to the cutting lines indicated in FIG. Due to the partial sections 163 of the molded bodies 160 and the bottom-side sealing of the cavities 161 achieved thereby, a rear leakage of the potting compound 180 can be prevented in this process.
- the sealing compound 180 may be a leuchtstoffge ⁇ filled encapsulant 180 having one or more Kon ⁇ version materials.
- the potting compound 180 may comprise a radiation-permeable potting or matrix material, for example silicone, and phosphor particles embedded therein (not shown). In this way, a part of a loading produced in the ⁇ drive of the radiation-emitting semiconductor chip 170 (primary) radiation can be converted (Volumenkon- version) with the aid of the sealing compound 180 at least.
- the removal of the connecting webs 150 can be carried out in a mechanical manner, for example by means of a stamping process. This process can be carried out as simply as possible due to the small connecting webs 150 and their arrangement on the longitudinal sides 111, 112 of the lead frame 110.
- the removal of the connecting webs 150 has the consequence that the short-circuit connections of the leadframe sections 120 serving as cathodes and anodes are interrupted, whereby the semiconductor chips 170 or semiconductor chip groups are now electrically connected in series.
- an electrical series connection of the semiconductor chips 170 or semiconductor chip groups arranged in the mounting regions 140 is provided.
- the adjacent lead frame portions 120 form part of the electrical series connection ⁇ rule.
- the shaped body 160 After removal of the connecting webs 150, the shaped body 160 provide a stable mechanical cohesion of the lead frame portions 120 of the lead frame 110. This is to ⁇ connection illustrates additional in Figure 18, is shown in wel ⁇ cher the light emitting device 100 fragmentary and greatly simplified.
- the lighting device 100 can be supplied with electrical energy via the two end conductor frame sections 120 (see FIG. WUR As indicated above ⁇ de may arranged for this purpose on the terminal areas 143 of the lead frame end portions 120 Anschlus- elements are used (not shown). It is possible in this case 143 to use in each case only one of the terminal portions 143 or both terminal portions of an end Schwarzrah ⁇ menabitess 120 or to be provided with a connecting element.
- the structure of the lighting device 100 makes it possible to shorten the lighting device 100 in a flexible manner or to divide it into a plurality of shorter devices with a smaller number of radiation-emitting semiconductor chips 170.
- the lighting device 100 or its leadframe 110 can be cut through at one or more separating lines 210 for this purpose.
- the dividing lines 210 are perpendicular to the longitudinal direction 200 of the lead frame 110 and the light emitting device 100 and are provided respectively in preparation ⁇ chen, in which previously the lead frame portions 120 connecting the connecting webs 150 ren present wa-.
- the semiconductor chip 170 may or Groups of semiconductor chips 170, as in the previously undivided device 100, be electrically connected in series.
- a lead frame portion 120 along ei ⁇ ner dividing line 210 is severed or cut in half, whereby from egg ⁇ nem such a lead frame portion 120 has two end side conductor ⁇ frame sections 120 present on the edge Rauberei- 143 (see Figure 6).
- the shorter devices formed by the cutting can have a matching appearance in the region of the opposite ends.
- Such dicing is enabled by the above-described configuration of the lead frame 110 having the connection portions 115 provided on the longitudinal sides 111, 112 and with respect to the longitudinal direction 200 at coincident positions, and the step shape of the lead frame portions 120.
- Dicing the light-emitting device 100 can be performed, for example, such that at least a shortened Leuchtvor ⁇ device with two mounting portions 140 and two series-connected semiconductor chip groups is formed.
- a device may have a structure according to FIGS. 17, 18. It is also possible a division, so that at least one shortened lighting device is produced with a different number of series-connected semiconductor chip groups.
- Dicing the light-emitting device 100 can be carried out such that at least one shortened Leuchtvor ⁇ direction with only one mounting area 140 and a semiconductor chip group is also formed DER.
- Such a device may have a construction according to FIGS. 19, 20.
- the embodiments explained with reference to the figures represent preferred or exemplary embodiments of the invention. In addition to the embodiments shown and described, further embodiments are conceivable which may include further modifications and / or combinations of features.
- the strip-shaped lead frame 110 may be provided with other shapes of lead frame portions 120, recesses, etc.
- connection regions 115 provided on the longitudinal sides 111, 112 with a different number of connection structures 150.
- connection regions 115 only a connection structure ⁇ each be provided 150th
- a different number of semiconductor chips 170 may be provided in the mounting areas 140 or in the cavities 161 of the molded bodies 160.
- a mounting portion 140 which is arranged on one of the arrival at this point present two Leite frame sections 120 and connected to the two frame Leite ⁇ portions 120 by means of bonding wires 175th
- all of the semiconductor chips 170 may be connected in series.
- each mounting portion may be provided chips 170, and are arranged similar to Figure 13 on a lead frame portion 120, and electrically interconnected via bond ⁇ wires 175 and connected to the two present at this point lead frame portions 120 become.
- additionally parallel-connected protective diodes 172 can be used.
- radiation-emitting semiconductor chips 170 with two front-side contacts it is also possible to use other radiation-emitting semiconductor chips.
- semiconductor chips having a front-side contact and a back-side contact This can as the Schutzdio ⁇ 172 to the back contact on a Porterrahmenab ⁇ section 120 be arranged, for example by using a brazing material or an electrically conductive adhesive ⁇ material.
- the front-side contact can be connected via a bonding wire 175 to an adjacent leadframe section 120.
- semiconductor chips with two back ⁇ side contacts These can be arranged on the rear side contacts on two adjacent lead frame sections 120, whereby a solder or an electrically conductive adhesive can also be used here.
- semiconductor chip groups it is possible, when semiconductor chip groups are used, to interconnect the semiconductor chips in the individual groups in parallel with one another or to provide combined series and parallel connections.
- the radiation-emitting semiconductor chips 170 can have conversion layers or platelet-shaped conversion elements on a front side
- the sealing compound 180 may comprise only a radiation-transmissive Ver ⁇ cast material.
- connection structures 150 With regard to the removal of the connection structures 150, it is conceivable to carry out this process at an earlier stage of the method, for example immediately after the formation of the shaped bodies 160.
- Another variant is not to remove the Mattsstruktu ⁇ ren 150 entirely, but to cut only so that remaining sections of the Verbin ⁇ making structures 150 may remain. This can likewise by punching, or also for example by sawing or
- a metallic output layer can also be mechanically structured, for example by means of stamping and / or embossing.
- moldings 160 with cavities 161 for receiving semiconductor chips form further moldings on the lead frame 110.
- Such shaped bodies, which can serve as additional mechanical Verbin ⁇ manure elements can be formed without cavities 161 and provided outside the mounting regions 140 on adjacent lead frame portions of the 120th
- the leadframe 110 with an additional dielectric or insulating layer on the front side.
- functional areas such as the mounting areas 140, the test terminal areas 141, 142 and the terminal areas 143, as well as areas in which the connecting structures 150 of the leadframe 110 are located, can remain uncovered.
- Such an insulating layer may, for example, be applied after the provision of the conductor frame 110 and before the formation of the shaped bodies 160 on the leadframe 110.
- an additional mechanical ⁇ specific stabilization of the lead frame 110 and mechanical connection of the lead frame portions 120 may be effected by means of the insulating layer. It may therefore be considered to perform removal or severing of the connection structures 150 after the formation of the insulating layer.
Landscapes
- Led Device Packages (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US15/500,182 US20170263836A1 (en) | 2014-07-30 | 2015-07-29 | Production of a device having a strip-type leadframe |
| DE112015003466.8T DE112015003466A5 (de) | 2014-07-30 | 2015-07-29 | Herstellung einer Vorrichtung mit streifenförmigem Leiterrahmen |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014110781.0 | 2014-07-30 | ||
| DE102014110781.0A DE102014110781A1 (de) | 2014-07-30 | 2014-07-30 | Herstellung einer Vorrichtung und Vorrichtung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2016016302A1 true WO2016016302A1 (de) | 2016-02-04 |
Family
ID=53758232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2015/067376 Ceased WO2016016302A1 (de) | 2014-07-30 | 2015-07-29 | Herstellung einer vorrichtung mit streifenförmigem leiterrahmen |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20170263836A1 (de) |
| DE (2) | DE102014110781A1 (de) |
| WO (1) | WO2016016302A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019120523A1 (de) * | 2019-07-30 | 2021-02-04 | OSRAM Opto Semiconductors Gesellschaft mit beschränkter Haftung | Leiterrahmenverbund, Verfahren zur Herstellung einer Mehrzahl von Bauteilen und Bauteil |
| US12176220B2 (en) | 2020-12-15 | 2024-12-24 | Stmicroelectronics Pte Ltd | Optical sensor package and method of making an optical sensor package |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008031580A1 (en) * | 2006-09-12 | 2008-03-20 | Paul Lo | Integrally formed single piece light emitting diode light wire |
| EP2381474A2 (de) * | 2010-04-23 | 2011-10-26 | Samsung LED Co., Ltd. | Leiterrahmen für ein lichtemittierendes Vorrichtungsgehäuse, lichtemittierendes Vorrichtungsgehäuse und Beleuchtungsvorrichtung mit dem lichtemittierenden Vorrichtungsgehäuse |
| EP2733751A1 (de) * | 2012-11-16 | 2014-05-21 | Nichia Corporation | Lichtemittierende Vorrichtung |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8089140B2 (en) * | 2008-09-25 | 2012-01-03 | Silitek Electronic (Guangzhou) Co., Ltd. | Lead frame assembly, lead frame and insulating housing combination, and led module having the same |
| US10367125B2 (en) * | 2012-07-30 | 2019-07-30 | Lumileds, LLC | Strengthened LED package and method therefor |
-
2014
- 2014-07-30 DE DE102014110781.0A patent/DE102014110781A1/de not_active Withdrawn
-
2015
- 2015-07-29 DE DE112015003466.8T patent/DE112015003466A5/de not_active Withdrawn
- 2015-07-29 US US15/500,182 patent/US20170263836A1/en not_active Abandoned
- 2015-07-29 WO PCT/EP2015/067376 patent/WO2016016302A1/de not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008031580A1 (en) * | 2006-09-12 | 2008-03-20 | Paul Lo | Integrally formed single piece light emitting diode light wire |
| EP2381474A2 (de) * | 2010-04-23 | 2011-10-26 | Samsung LED Co., Ltd. | Leiterrahmen für ein lichtemittierendes Vorrichtungsgehäuse, lichtemittierendes Vorrichtungsgehäuse und Beleuchtungsvorrichtung mit dem lichtemittierenden Vorrichtungsgehäuse |
| EP2733751A1 (de) * | 2012-11-16 | 2014-05-21 | Nichia Corporation | Lichtemittierende Vorrichtung |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102014110781A1 (de) | 2016-02-04 |
| US20170263836A1 (en) | 2017-09-14 |
| DE112015003466A5 (de) | 2017-04-13 |
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