WO2014033152A1 - Gehäuse, elektronische baugruppe, gehäuseverbund, verfahren zum herstellen eines gehäuses und verfahren zum herstellen einer elektronischen baugruppe - Google Patents
Gehäuse, elektronische baugruppe, gehäuseverbund, verfahren zum herstellen eines gehäuses und verfahren zum herstellen einer elektronischen baugruppe Download PDFInfo
- Publication number
- WO2014033152A1 WO2014033152A1 PCT/EP2013/067777 EP2013067777W WO2014033152A1 WO 2014033152 A1 WO2014033152 A1 WO 2014033152A1 EP 2013067777 W EP2013067777 W EP 2013067777W WO 2014033152 A1 WO2014033152 A1 WO 2014033152A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- housing
- lead frame
- receiving
- recess
- molding material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- 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
- H10W70/00—Package substrates; Interposers; Redistribution layers [RDL]
- H10W70/40—Leadframes
- H10W70/421—Shapes or dispositions
-
- 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
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W70/00—Package substrates; Interposers; Redistribution layers [RDL]
- H10W70/01—Manufacture or treatment
- H10W70/04—Manufacture or treatment of leadframes
- H10W70/048—Mechanical treatments, e.g. punching, cutting, deforming or cold welding
-
- 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
- H10W70/00—Package substrates; Interposers; Redistribution layers [RDL]
- H10W70/40—Leadframes
- H10W70/411—Chip-supporting parts, e.g. die pads
-
- 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
- H10W74/00—Encapsulations, e.g. protective coatings
- H10W74/01—Manufacture or treatment
- H10W74/016—Manufacture or treatment using moulds
-
- 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
- H10W74/00—Encapsulations, e.g. protective coatings
- H10W74/10—Encapsulations, e.g. protective coatings characterised by their shape or disposition
- H10W74/131—Encapsulations, e.g. protective coatings characterised by their shape or disposition the semiconductor body being only partially enclosed
-
- 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
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W90/00—Package configurations
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/49155—Manufacturing circuit on or in base
- Y10T29/49158—Manufacturing circuit on or in base with molding of insulated base
Definitions
- the invention relates to a housing for an electronic component.
- the housing has a leadframe section and a molding material.
- the leadframe portion is formed of an electrically conductive material and has a receiving area for receiving the electronic component and / or a contact area for contacting the electronic component.
- the lead frame section is embedded in the molding material, wherein the molding material has at least one receiving recess. In the receiving recess of the receiving area and / or the contact area are exposed.
- the invention relates to an electronic Bau ⁇ group, a housing composite, a method for producing a housing and a method for producing an electronic assembly.
- German priority application DE 10 2012 215 285.7 which expressly forms part of the disclosure of the present application, also describes a housing, an electronic assembly, a housing assembly, a method for manufacturing a housing and a method for producing an electronic assembly.
- CMOS complementary metal-oxide-semiconductor
- QFN quad f_lat no leads
- IC integrated circuits
- QFN includes different sizes of IC packages, all of which can be soldered as surface mounted components on printed circuit boards
- QFN is also used to represent the following Designations used include: Micro Leadframe Package Quad (MLPQ), Micro Leadframe Package Micro (MLPM), Micro Leadframe Package Dual (MLPD), Dual Row Micro Leadframe Package (DRMLF), Dual Fiat No-lead Package (DFN), Thin Dual Fiat No-lead Package), Ultra Thin Dual Fiat No-lead Package (UTDFN), Extreme Thin Dual Fiat No-lead Package (XDFN), QFN-TEP (Quad Fiat No Lead Package with Top Exposed Ped), TQFN (Thin Quad Flat No-lead package), VQFN (Very Thin Quad Flat No leads Packa ge ⁇ ).
- the electrical connec ⁇ se do not project laterally beyond the dimensions of the plastic coating, the housing, but are in the form of non-tin-plated copper connectors, for example, can be formed by the undersides of the leadframe sections, integrated plan into the bottom of the housing. This can be reduced to the board the space required to ⁇ and a higher packing density can be achieved. Furthermore, a particularly good heat dissipation can be ensured to the circuit board.
- the lead frame portions are made of lead frames simplistic ⁇ tent.
- the lead frames comprise, for example, an electrically conductive material, such as copper, or are formed from ⁇ represents.
- the lead frame portions are used for example for the mechanical fixing and / or for electrically contacting electronic components such as chips, for example semiconductor chips, and / or electromag netic radiation ⁇ emitting devices.
- the lead frame sections for example, receiving areas for receiving the electronic components, and / or contact areas for electrically contacting the electronic components.
- the lead frames are embedded in a molding material, for example in a mold material.
- the molding material may be formed as KunststoffStuffummantelung.
- the structure of molding material and the one in it Embedded lead frame can also be referred to as a housing composite.
- the fact that the lead frames orêtrahmenab ⁇ sections are embedded in the mold material, for example, means that the lead frame or the lead frame sections are at least partially surrounded by the molding material.
- Parts of the leadframe may remain free of molding material, for example the electrical connections for contacting the housings, in particular the leadframe sections of the housings, and / or for example on an upper side of the leadframe receiving recesses in which the receiving areas and / or contact areas are released.
- the electrical contacts of Ge ⁇ housing are formed on an opposite side of the receiving portions of the lead frame portions.
- the electrical contacts are formed by the undersides of the leadframe sections.
- bent housing assemblies or housings may pose problems in subsequent machining processes. For example, the bent housing assemblies on rolling tapes, magazine inputs or outputs and / or suction on a vacuum table can be handled relatively poorly.
- One cause of the deflection is, for example, the different coefficients of thermal expansion (CTE) between the material of the leadframe and the material of the leadframe Molding material, for example, a thermoset aufwei ⁇ Sen, for example, epoxy resin, silicone resin, or a thermoplastic, such as PPA or polyester.
- CTE coefficients of thermal expansion
- the CTE of the molding material is usually higher than the glass transition temperature of the material of the lead frame and un ⁇ ter the glass transition temperature below the CTE of the material of the lead frame. Because of these differences the heat from ⁇ expansion coefficient, the above- ⁇ be specified deflection occurs, for example korrespondie ⁇ rend to the known bi-metal effect.
- a molding material epoxy-based resins for example, an EMC (electro Mold Compound) whose CTEs below their glass ⁇ transition temperature, for example between 7 ppm / K to 12 ppm / K amount, and for the material of the lead frame beispielswei ⁇ se to use a FeNi alloy, for example Alloy 42, with a CTE of about 8 ppm / K. Len Using this materi- but the bending held ⁇ th can not be prevented in the housing composite low.
- highly heat conductive lead frames such as copper, may be desired.
- a housing and an electronic assembly are provided which are simple, can be produced precisely and / or with only a small or no deflection.
- a method for producing a housing for electronic components and a method for producing an electronic assembly are provided that are simple and / or precise feasible and / or in which a deflection of a housing assembly during the manufacturing process can be reduced or prevented ver ⁇ ,
- a housing for an electronic component has a leadframe portion which is formed of an electrically conductive material and which has a receiving region for receiving the electronic component and / or a contact region for contacting the electronic component.
- the housing further comprises a molding material in which the leadframe portion is embedded.
- the molding material has at least one receiving recess in which the receiving area and / or the contact area are exposed.
- the molding material has at least one voltage reduction recess that is free of the receiving region and / or the contact region.
- the voltage reduction recess causes during a manufacturing process for producing the housing a Reduzie ⁇ tion of a corresponding to the bi-metal effect effect between the molding material and the lead frame portion and thus helps to prevent bending of the lead frame and the molding material or at least verrin ⁇ gladly. Because of preventing or reducing the Naturalbie ⁇ supply the following machining processes can be carried out easily and accurately.
- That the voltage reduction recess is free of the receiving region and / or the contact region means, for example, that the voltage reduction recess has no other Purpose has as to reduce the voltage between the mold material and the lead frame and / or that in subsequent machining processes, the voltage reduction recess is not used for arranging and / or contacting electronic components.
- the receiving recess can play as referred to in ⁇ as a cavity.
- the housing may for example also be referred to as a mold array.
- the electronic component may for example also be referred to as a unit. Furthermore, a plurality of electronic components may be arranged in a housing.
- the electronic components arranged in the receiving recess can be enveloped and / or embedded in the enveloping material, for example with or in silicone or in silicone with a converter for converting electromagnetic radiation or with T1O 2 , wherein the enveloping material for example, in part or completely covered with a black epoxy.
- the housing may have, for example, two, three or more of the stress reduction recesses.
- the housing may be formed, for example, as a QFN housing. This means, for example, that the housing has no wires leading to the outside, which for example project laterally out of the housing and which would have to be bent downwards when arranging the housing onto a printed circuit board, for example, but the QFN housing has on its underside, electr ⁇ cal connections, which are formed for example by the Lei ⁇ terrahmenab mustard and by the placement of the QFN housing on the circuit board both a mechanical and an electrical coupling of the QFN housing and with ⁇ means of the lead frame section and an electrical Kopp ⁇ ment the electronic component arranged therein is connected to the printed circuit board.
- the printed circuit board may be, for example, an FR1, FR2, FR3, FR4, FR5, CEM1, CEM2, CEM3, CEM4 or CEM5 printed circuit board, for example a plated-through FR-4 printed circuit board.
- the voltage reduction recess is formed so deeply that the material of the leadframe section is exposed in the voltage reduction recess. This can easily and effectively contribute to a substantial reduction in sag.
- the voltage reduction recess has a groove in the molding material.
- the groove can easily help to prevent and / or reduce the deflection.
- the groove can be formed in a simple and / or known manner.
- no receiving recess is formed in a free area, which it extends ⁇ in the molding material along a direction parallel to a surface of the lead frame portion and parallel to a lateral outer wall of the housing and the clamping ⁇ Vietnamesesreduktionsaus originallyung is formed in the free area.
- the voltage reduction recess can be formed, for example, precisely in the free areas in which otherwise the molding material would extend from one end to the other end of the housing and in which therefore particularly high forces would act on the housing assembly. This can help a particularly effective way to Verhin ⁇ countries or decreasing the bending of the housing association.
- an electronic module comprising a housing, for example, the above-explained case, and an electronic Bauele ⁇ ment.
- the electronic component is disposed in the receiving area on ⁇ the housing and / or in electrical contact in the contact region of the housing ⁇ .
- the tension production recess is free of electronic components and / or electrical contacts.
- the electronic component may, for example, an electromagnetic radiation emittie ⁇ rendes component and / or a chip, for wise a semiconductor chip to be.
- the electromagnetic radiation emitting device may for example be a LED and / or egg ⁇ ne OLED.
- a method of manufacturing a case for electronic component is provided, for example for manufacturing the housingchoge ⁇ starting explained.
- a lead frame portion is provided, which is formed from an electrically lei ⁇ border material and having a receiving area for receiving the electronic component and / or a contact area for contacting the electronic component.
- the lead frame section is embedded in a form ⁇ material.
- at least one receiving recess is formed in which the Consbe ⁇ rich and / or the contact region are exposed.
- at least onepulsreduktionsausneh ⁇ mung is formed, which is free from the receiving area and / or the contact region.
- the stress reduction recess can be formed for example in the form of a groove. Furthermore, two, three or more corresponding voltage reduction recesses can also be formed.
- theistsreduk- tion recess is formed so deep that the material of the leadframe portion is exposed in the voltage reduction recess.
- a free area is formed in the molding material.
- the free area extends in the mold material along a direction parallel to a surface of the lead frame portion and parallel to a lateral outer wall of the housing. In the free area is no receiving recess formed. Theorsredukti- onsaus originallyung is formed in the free area.
- the leadframe section is provided in a composite with further leadframe sections as a leadframe.
- the lead frame portion is embedded in the molding material by embedding the lead frame in the molding material.
- the embedded Lei ⁇ terrahmen forms a composite housing.
- For each lead frame section at least one receiving recess and at least one voltage reduction recess are formed. From the housing assembly several housings are separated by the embedded leadframe sections are separated from each other.
- the housing is produced by first the housing assembly is made having the embedded in the molding material lead frame, and then by the housing having each one of the Porterrahmenab ⁇ sections are separated from the housing assembly.
- the Tren ⁇ NEN the lead frame sections from one another may comprise beispielswei ⁇ se a cutting or sawing of the composite body and / or of the lead frame.
- the leadframe has a long side and a short side parallel to its surface.
- the stress reduction recesses are formed, for example, perpendicular to the long side and / or parallel to the short side. This can be particularly effectively contribute to preventing and / or decreasing the deflection of the housing composite, because the bending is substantially and / or generally occurs along the long side and then passing the bend along the long side and be ⁇ Sonders can be effectively reduced if the voltage ⁇ reduction recess is formed perpendicular to the course of the bend.
- each housing in the housing ⁇ composite defined by predetermined housing boundaries.
- the Ge ⁇ koruse bayn may lie in transition areas at the junctions, for example at the junctions and / Odei.
- the voltage reduction recesses can now be formed on the housing boundaries and / or the housing boundaries overlapping and / or lying on the housing boundaries.
- the voltage reduction recesses are formed in areas in which subsequently the housings are to be separated, for example, to be sawn.
- Thechrosredukti- onsauslangisme can extend along the entire housing boundaries or only over part of the housing boundaries.
- a plurality of clamping ⁇ Vietnamese sewagesreduktionsauslangieri may be formed along a boundary housing which are separated by voneinandei molding material.
- the stress reduction recesses may be formed to adequately separate the molding material associated with different housings.
- the voltage reduction recesses may for example be designed so that they partially separate the individual housings in the housing assembly from each other or completely, in particular their form ⁇ material.
- the housings are out of the housing composite isolated by separation of the individual Ge ⁇ housing in the region of at least some of the voltage reduction ⁇ recesses.
- This can contribute to a particularly simple and / or rapid separation of the housing, since in the region of the stress reduction recesses only little or no molding material has to be severed. This can help to essentially cut through only the lead frame.
- the separation can, for example, by sawing or cutting the housing assembly and / or the lead frame he follow ⁇ .
- a saw blade for separating the housing can be chosen so wide that the corresponding saw ⁇ cut has a width that corresponds to the width of thechrosredukti- onsausEnglishstead or almost corresponds.
- the saw ⁇ sheet strength can be chosen, for example, that in In the finished housing, the voltage reduction recess is good, hardly or not at all recognizable.
- a conductor frame voltage reduction recess in the leadframe in a region that is free of molding material, a conductor frame voltage reduction recess is formed.
- the conductor frame voltage reduction recess may be formed in the lead frame, for example.
- the lead frame voltage reduction recess may be formed, for example, between two large areas of molding material.
- the leadframe voltage reduction recess may be formed, for example, along a center line which marks a center of the long side of the leadframe and which extends perpendicularly to the long side.
- the lead frame voltage reduction recess may extend through the entire thickness of the lead frame.
- the leadframe stress reduction recess in the leadframe, as well as the stress reduction recess in the molding material may help to prevent and / or reduce deflection of the housing assembly.
- a method for producing an electronic assembly in which a housing is formed, for example according to the method explained above, and in which the electronic component or components are arranged in the receiving recess before or after singulating the housing from the housing assembly and / or contacted.
- Embodiments of the invention are in the figures Darge ⁇ provides and are explained in more detail below.
- Figure 1 is a sectional view in side view of a
- Figure 2 is a side view of an embodiment ei ⁇ nes housing composite
- Figure 3 is a side view of an embodiment ei ⁇ nes housing composite
- Figure 4 is a side view of an embodiment ei ⁇ nes housing composite
- FIG. 5 shows a diagram with curves of thermal expansion coefficients as a function of the temperature
- Figure 6 is a plan view of an embodiment of a
- Figure 7 is a sectional side view of the housing assembly according to Figure 6;
- Figure 8 is a plan view of an embodiment of a
- Figure 9 is a sectional side view of the housing assembly according to Figure 8.
- Figure 10 is a plan view of an embodiment of a
- Figure 11 is a sectional view in side view of the housing assembly according to Figure 10;
- Figure 12 is a sectional detail view of an embodiment ⁇ example of a voltage reduction recess ;
- FIG. 13 shows a saw cut through an embodiment of a voltage reduction recess
- Figure 14 is a saw cut through an embodiment of a voltage reduction recess
- Figure 15 is a plan view of an embodiment of a housing assembly
- FIG. 16 is a sectional side view of the Ge ⁇ housing composite according to Figure 14;
- Figure 17 is a plan view of an embodiment of a
- Figure 18 is a perspective view of an embodiment ⁇ example of an electronic module
- FIG. 19 shows a perspective view of an embodiment of an electronic assembly
- Figure 20 is a flow diagram of one embodiment ei ⁇ nes method for manufacturing a housing for an electronic component and a method of fabricating an electronic assembly.
- An electronic component can be, for example, a component emitting electromagnetic radiation.
- An electromagnetic radiation-emitting device may in various embodiments be a electromagnetic radiation-emitting semiconductor component and / or emitting the electromagnetic radiation-emitting diode, as an organic electromagnetic radiation emitting Di ⁇ ode, as an electromagnetic radiation emitting transistor or as an organic electromagnetic radiation emitting Transistor be formed.
- the radiation may, for example, be light in the visible range, UV light and / or infrared light.
- the electromagnetic radiation-emitting component may be formed, for example, as a light-emitting diode (LED) as an organic light-emitting diode (OLED), as a light-emitting transistor or as an organic light-emitting transistor.
- the light-emitting component can be part of an integrated circuit in various exemplary embodiments. Furthermore, a plurality of light-emitting components may be provided, for example housed in a common housing.
- Fig.l shows a sectional view of aforementioned ⁇ game of a conventional housing 10 for an electronic Component.
- the housing 10 may for example comprise a conductor ⁇ frame portion 12 and a molding material fourteenth
- the leadframe portion 12 can be embedded, for example in the form of plant material ⁇ fourteenth
- a receiving recess 18 may be formed.
- the receiving recess 18 serves, for example, for receiving and / or contacting the electronic component (see FIGS. 17 to 19).
- the leadframe portion 12 of play has a receiving area for receiving the electronic component and / or a contact area for contacting the electronic component at ⁇ .
- the cinnamonbe be ⁇ rich and / or the contact area can be arranged for example in the receiving recess 18 and exposed.
- the leadframe portion 12 can for example have a elekt ⁇ driven conductive material.
- the material of the conductor ⁇ frame portion 12, for example, have a particularly high electrical conductivity.
- the material may in ⁇ game as copper, for example, CuW or CuMo, Kupferle- alloys, having brass, nickel and / or iron, such as Fe-Ni and / or may for example be formed therefrom.
- the molding material 14 may for example comprise a anorgani ⁇ ULTRASONIC material, for meadow a composite material, game, in ⁇ epoxy resin and / or silicone, a silicone hybrid, and / or silicone-epoxy hybrid.
- a thickness of the lead frame portion 12 may be at play ⁇ example 100 pm to 500 pm, for example 150 pm to 300 pm.
- the housing 10 is, for example, a QFN housing and / or a housing element of a QFN package, for example an MLPQ (Micro Leadframe Package Quad), MLPM (Micro Leadframe Package Micro), MLPD (Micro Leadframe Package Dual), DRMLF (Dual Row Micro Leadframe Package), Dual Fiat No-lead Package (DFN), Thin Dual Fiat No-lead Package (TDFN), Ultra Thin Dual Fiat No-lead Package (UTDFN), XDFN (Extreme thin Dual Fiat No-lead Package), QFN-TEP (Quad Fiat No-lead Package with Top Exposed Ped), TQFN (Thin Quad Fiat No-lead Package), VQFN (Very Thin Quad Fiat No Leads Package) Packa ⁇ ges.
- MLPQ Micro Leadframe Package Quad
- MLPM Micro Leadframe Package Micro
- MLPD Micro Leadframe Package Dual
- DRMLF Dual Row Micro Leadframe Package
- the housing 10 may serve, for example, for receiving and / or contacting the electronic component or two or more electronic components.
- the electrical con- clocking of the electronic component can be effected, for example, via the lead frame portion 12 which electrically at ⁇ play, on its underside (the underside in Figure 1) with a non-illustrated circuit board
- the housing 10 can have a very good behavior in case of thermal cycling, as the material of the circuit board portion 12 can be adapted particularly well to the motherboardausdeh ⁇ expansion coefficient of the circuit board and / or the heat sink.
- the printed circuit board can be, for example, an FR1, FR2, FR3, FR4, FR5, CEM1, CEM2, CEM3, CEM4 or CEM5 printed circuit board, for example a plated-through FR-4 printed circuit board.
- Fig. 2 shows a side view of an embodiment of a housing bond 20.
- the housing composite 20 may ⁇ play, have a lead frame 22 in which may comprise for example a plurality of lead frame portions 12, which may be interconnected via the lead frame and / or which may form the lead frame ,
- the lead frame 22 may be coated with the molding material 14 and / or embedded in the molding material 14.
- the individual lead frame sections 12 and further details of the housing assembly 20, the molding material 14 and / or the lead frame sections 12 are not shown.
- FIG. 3 shows an exemplary embodiment of the housing assembly 20 according to FIG. 2, in which the housing assembly 20 and / or the housing housing 10 are bent in its center downwards, which will be explained in more detail below.
- Fig. 4 shows an embodiment of the housing assembly 20 according to Figure 2, in which the housing assembly 20 and / or the Ge ⁇ housing 10 are bent in its center upwards, which will be explained in more detail below.
- Fig. 5 shows an embodiment of a diagram in which an example of a course CTE_F of coefficients of thermal ⁇ coefficient CTE of the material of the mold material 14 in ppm per Kelvin and a history CTE_C coefficient of thermal expansion CTE of the material of the lead frame 22 in ppm per Kelvin as a function of temperature T are drawn. From the diagram it is apparent that the coefficients of thermal ⁇ coefficient CTE is below a glass transition temperature Tg of the material of the mold material 14, for example, under the heat ⁇ expansion coefficient CTE of the material of the lead frame 22 and is above the glass transition temperature Tg above the coefficient of thermal expansion CTE of the material of the lead frame 22nd
- a curing temperature Tc of the material of the mold material 14 may, for example, at a 145 ° C lie ⁇ gen.
- the material of the mold material 14 is hard or fixed .
- the strength in design, materials abruptly changes as the mold material 14 so that this Tg is soft or viscous above the glass transition temperature.
- the temperature-induced material expansions of the material of the molding material 14 and the material of the lead frame 22 differ more or less strongly depending on the temperature.
- the material of the lead frame 22 may be stronger stretch ⁇ than the material of the mold material 14 at high temperatures and at low At temperatures the material of the molding material 14 can expand more than the material of the lead frame 22. This leads at different temperatures to different effects according to the known bi-metal effect, although the material of the molding material 14 may also be free of metal.
- a temperature of ge Serviceh ⁇ th in Figure 3 embodiment of the housing assembly 20 is about 135 ° C, which causes the deflection of the housing assembly 20 and / or the housing 10 in its center down.
- a temperature of the ge Service ⁇ th in Figure 4 embodiment of the housing assembly 20 for example, below 50 ° C, for example below 30 ° C, for example, about 25 ° C, which is the deflection of the housing assembly 20 and / or the housing 10 in its center causes upward.
- FIG. 6 and FIG. 7 show an exemplary embodiment of a housing composite 20, which may have, for example, a plurality of housings 10 with corresponding leadframe sections 12, which may be connected to one another via the leadframe 22 and the molding material 14.
- Figure 6 is a plan view of the housing composite 20
- Figure 7 is a sectional view of the composite housing 20 along the section shown in Figure 6 ⁇ edge.
- the housing 10 may be formed largely corresponding to the housing shown in Figure 1.
- the housings 10 and / or the housing assembly 20 shown in FIG. 6 have a plurality of stress-reducing recesses 24 formed in the molding material 14 for avoiding or reducing the above-described deflection.
- the voltage reduction recesses 24 may be regularly distributed over the individual housings 10.
- each For example, one, two, three or more stress reduction recesses 24 may be formed, for example next to a respective receiving region 18.
- the stress reduction recesses 24 may be smaller, larger or the same size compared to the receiving region 18.
- only onepsreduktionsausANSung 24 may be formed per housing 10 which extends, for example, from a un ⁇ lowermost of permissreduktionsausANSung 24 shown in Figure 6 one of the housing 10 to a top of the same casing 24 shownchrosreduktionsausnaturalines 10th
- the deflection can be further reduced or prevented by, for example, forming a region in the center of the housing composite 20 in which the leadframe 22 is free of molding material 14 and in which, for example, one, two or more lead frame stress reduction recesses 26 are formed.
- FIGS. 8 and 9 show a further exemplary embodiment of a housing composite 20, which can largely correspond to the exemplary embodiment of the housing composite 20 explained with reference to FIGS . 6 and 7.
- FIG. 8 shows a plan view of the housing assembly 20 and FIG. 9 a
- the voltage reduction recesses 24 may, for example, be designed such that they are formed in the housing assembly 20 in the molding material 14 at transitions from one of the housings 10 to another of the housings 10.
- the transitions can also be boundaries of the housing 10.
- the stress reduction recesses 24 may be formed along dividing lines 28 drawn in FIG. 8, at which the housings 10 are subsequently singulated, for example cut or sawn.
- this can help the separation, such as cutting or sawing ver ⁇ simple, since then less material of the molding material 14 ge ⁇ separates, in particular sawn or cut must be. This can, for example, contribute to a Trennwerk- convincing, such as a saw blade is less wear under ⁇ .
- FIGS. 10 and 11 show a further exemplary embodiment of a housing composite 20, which can largely correspond to one of the exemplary embodiments of the housing assembly 20 explained above.
- FIG. 10 shows a plan view of the housing assembly 20
- FIG. 11 shows a sectional view of the housing assembly 20 along that shown in FIG.
- the featuresreduktionsaus- recesses 24 may be formed continuously at the transitions from one housing 10 to another of the housing 10 so that, for example, with respect to the molding material 14, the housing 10 are already separated from each other in the housing assembly 20. This can for example help to simplify the separation, crizspielswei ⁇ se cutting or sawing process because then single ⁇ Lich the material of the lead frame 20 must be disconnected and not the mold material 14.
- thematsreduktionsaus traditions 24 also be made in extend continuously in one direction, for example according to FIG. 10, and be interrupted in another direction, for example perpendicular thereto, for example according to FIG. 8.
- the stress reduction recesses 24 at the transitions according to FIGS. 8 and / or 10 can be interrupted by the stress reduction recesses 24 be combined according to FIG.
- Fig. 12 shows a cross section through an embodiment of achrosreduktionsausappelituated 24, for example one of the previously explainedchrosreduktionsausappelungen 24.
- Thematsreduktionsausappelung 24 may for example have a width B from 0.1 to 10.00 mm, beispielswei ⁇ SE from 2 to 4 mm ,
- the voltage reduction tion recess 24, for example have a depth T, which may correspond to a thickness of the molding material 14 on the lead frame 12, for example.
- the lead frame 12 may be exposed in the stress reduction recess 14 and / or be free of molding material 14.
- side walls of the recesses, through which thematsreduktionsausappelisme 24 are formed for example, have an angle to a perpendicular to a surface of the lead frame 22 be, for example, between 1 and 20 degrees, for example between 5 and 15 degrees, beispielswei ⁇ se about 9 degrees can.
- FIG. 13 shows the cross section of the exemplary embodiment of the voltage reduction recess 24 shown in FIG. 12 after a singulation of the housing 10, for example after a separation of the leadframe sections 12 from one another.
- the singulating and / or separating is done for example in one
- Cutting or sawing process performed.
- the sawing process it is possible, for example, to use a saw blade having a first width Wl which, for example, is smaller than the width B of the stress reduction recess 24. This has the effect that the oblique side walls of the stress reduction recesses 24 are retained at the edge in the subsequently singulated housings 10.
- FIG. 14 shows the cross section of the exemplary embodiment of the voltage reduction recess 24 shown in FIG. 12 after the housing 10 has been singulated, for example after the leadframe sections 12 have been separated from one another.
- the separation and / or separation is for example in one
- a saw blade having a second width W2 may be used for example, which is almost as large, equal to or greater than the width
- Fig. 15 and Fig. 16 show another embodiment of a composite housing 20 which may largely correspond to one of the proceeding vorste ⁇ described embodiments of the composite housing 20.
- FIG. 15 shows a plan view of the housing assembly 20
- FIG. 16 shows a sectional view of the housing assembly 20 along that shown in FIG
- the exemplary embodiment of the housing assembly 20 may, for example, only have leadframe stress reduction recesses 26, for example a leadframe stress reduction recess 26, in the leadframe 22.
- the lead frame stress reduction recess 26 may be formed prior to embedding the lead frame 22 in the molding material 14.
- the lead frame voltage reduction recesses 26 may be formed in a center of the lead frame 22, for example.
- the lead frame stress reduction recesses 26 may be formed along a center line that indicates a center of a long side of the lead frame 22 and that is perpendicular to the long side.
- the lead frame voltage reduction recesses 26 may extend through the entire thickness of the lead frame 22.
- FIG. 17 shows, in contrast, an embodiment of a housing composite 20, which can in principle speak one of the above it ⁇ läuterten embodiments of the housing composite 20 ent ⁇ , wherein Figure 17 shows the housing composite 20, as can for example be designed in detail.
- electronic components 30 can be arranged, for example, in receiving areas, and / or the electronic components 30 can be incorporated in the constructions. be contacted electrically contact areas.
- lead frame 24 for example, one, two or more leadframe stress reduction recesses 26 may be formed in the center, for example.
- the composite casing 20 has a long side and a short AI Be ⁇ te A2, where A2 is the short side, for example, perpendicular to the long side of AI.
- the voltage reduction ⁇ recesses 24 and / or the lead frame canpsreduktionsausEnglishept 26 of this or of the embodiments described starting scige- be perpendicular to the long side of AI and / or formed in parallel to the short side A2.
- Fig. 18 shows an electronic assembly comprising a housing, for example, one of the housing 10 previously described, and for example, several, for example five, electronic components 30 has ⁇ specific.
- the electronic module may also have more or fewer electronic components 30.
- the electronic components 30 may comprise game examples, electromagnetic radiation emitting Bauele ⁇ elements.
- the electronic components 30 may be electrically connectedness for example by means of bonding connections 34 with contact ⁇ areas 32 of the lead frame portion 12 be his.
- the housing 10 may, for example, at two of its corners and / or parallel to the receiving area 18 each have two voltage reduction recesses 24. Alternatively, however, more or only onechrosredukti- onsaus Principleung 24 may be formed.
- Fig. 19 shows an embodiment of an electronic assembly which may, for example, largely correspond to the exemplary embodiment explained with reference to Fi ⁇ gur 18 of the electronic assembly, the electronic assembly, for example, only at two of its corners and / or parallel to the receiving portion 18, a large voltage reduction ⁇ recesses 24 may have.
- the pelletsreduktionsausNase 24 may be formed, for example, in the free areas 36, the example ⁇ , parallel to a long side wall of the housing extending and parallel to a surface of the Leitrahmenab- section 12 and which is free from receiving areas and contact areas.
- the stress reduction recesses 24 may be formed just in the free areas 36 where the mold material 14 would otherwise extend over a relatively large area. This can be particularly effective in helping to prevent or reduce the bending of the housing assembly 22 and / or the housing 10.
- Fig. 20 shows a flow diagram of one embodiment of a method for manufacturing a housing for a elekt ⁇ ronisches component, for example for making one of the housing previously described 10.
- the method serves as to ⁇ to manufacture the housing 10 without or at least with only a slight bending of and / or bending the housing assembly 20 during the manufacturing process to ver ⁇ reduce or prevent.
- a lead frame is provided, for example one of the above-explained lead frames 22.
- the lead frame 22 may have a plurality of lead frame portions 12.
- a copper sheet may be provided as the conductor frame blank, in which the lead frame sections 12 may be formed, for example, by means of one or two etching processes.
- a step S4 optionally, one, two or more of the leadframe stress reduction recesses 26 may be formed in the lead frame 22.
- the steps S2 and S4 may be performed simultaneously.
- the lead frame may be formed in the same etching processpsreduktionsausappelisme 26 as the lead frame portions 12 age ⁇ native to the lead frame canpsreduktionsausappel 26 in a subsequent process, such as an etching process or a
- the lead frame 22 can be embedded in the molding material 14.
- the lead frame 22 for example, in a mold for forming the mold ⁇ material 14, 16 are arranged.
- the molding tool may have, for example, an upper molded body (topmold) and a lower molded body (bottomold).
- At least one of the shaped bodies, for example the upper shaped body has a plurality of highlights, by means of which the receiving recesses 18 and / or the stress reduction recesses 24 are formed during the formation of the molding material 14.
- the highlights stand out in the closed mold, for example, except for the lead frame, so that it remains free of mold material in the areas in which the emphasis is arranged.
- the mold can be closed and the mold can be supplied liquefied molding material.
- the mold material can at ⁇ play, with a temperature of 150 ° C to 190 ° C, the pitch fed at ⁇ with about 175 ° C.
- the form- Material can for example be injected or poured.
- the molding material settles in the mold around the highlights and on and under the lead frame 22.
- the housing assembly 20 can be cured in the mold or removed from the mold and then cured. For example, you can cool the housing assembly 20 or cool, for example, to a temperature below 135 ° C, for example, to about 25 ° C. Due to thematsreduktionsaus Principlessen 24 is a
- the at least substantially flat housing composite 20 can simply be sucked in, transported on a conveyor belt, equipped with the electronic components 30 and / or singulated.
- the housings 10 can be singulated out of the housing assembly 20.
- the housing ⁇ composite can be cut or sawn 30, whereby the single housing 10 can be separated from each other.
- Each of the housings 10 may be referred to as a QFN package, for example.
- the housing 10 can be Herge ⁇ represents.
- the method of manufacturing the housing 10 may be terminated after the processing of the step S8.
- one more step S10 can also be carried out, 30 arranged in the one, two or more electronic ⁇ construction elements in the housing 10 and contacted by the ⁇ .
- the housing 10 together with the electronic components 30 may be, for example, an electronic assembly
- the step S10 may, for example before or after the step S8, so there game carried out at ⁇ before or after singulation.
- the step S10 can be ⁇ also referred to as mounting of the housing 10th
- the steps S2 to S10 may also be referred to as Ver ⁇ drive for manufacturing an electronic module.
- the electronic components 20 arranged in the receiving recess 18 can be enveloped, for example, with a shell material and / or embedded in the shell material, for example with or in silicone or in silicone with a converter for converting electromagnetic radiation or with T1O 2 , the shell material for example. It may be partly or completely covered with a black epoxy.
- the enveloping or embedding of the electronic components 30 can be carried out, for example, before or after the singulation of the housing 10.
- the invention is not limited to the specifiedssensbei ⁇ games.
- the individual exemplary embodiments can be combined with each other.
- the voltage reduction recesses shown in FIGS. 6 to 16 may be formed together in any combination on a housing assembly 20 and / or a housing 10.
- the stress reduction recesses 24 may be formed in the fine regions 36 and the transition regions. Further, the voltage reduction ⁇ recesses 24 may be partially formed continuously and partially individually.
Landscapes
- Led Device Packages (AREA)
- Lead Frames For Integrated Circuits (AREA)
- Structures Or Materials For Encapsulating Or Coating Semiconductor Devices Or Solid State Devices (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE112013004274.6T DE112013004274B4 (de) | 2012-08-29 | 2013-08-28 | Gehäuseverbund, Verfahren zum Herstellen eines Gehäuses und Verfahren zum Herstellen einer elektronischen Baugruppe |
| US14/424,539 US9673136B2 (en) | 2012-08-29 | 2013-08-28 | Housing arrangement, method of producing a housing and method of producing an electronic assembly |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012215285.7 | 2012-08-29 | ||
| DE102012215285.7A DE102012215285A1 (de) | 2012-08-29 | 2012-08-29 | Gehäuse, elektronische Baugruppe, Verfahren zum Herstellen eines Gehäuses und Verfahren zum Herstellen einer elektronischen Baugruppe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014033152A1 true WO2014033152A1 (de) | 2014-03-06 |
Family
ID=49035596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2013/067777 Ceased WO2014033152A1 (de) | 2012-08-29 | 2013-08-28 | Gehäuse, elektronische baugruppe, gehäuseverbund, verfahren zum herstellen eines gehäuses und verfahren zum herstellen einer elektronischen baugruppe |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US9673136B2 (de) |
| DE (2) | DE102012215285A1 (de) |
| WO (1) | WO2014033152A1 (de) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008038937A1 (en) * | 2006-09-29 | 2008-04-03 | Seoul Semiconductor Co., Ltd. | Luminous element |
| US7524087B1 (en) * | 2007-11-16 | 2009-04-28 | Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. | Optical device |
| US20110241028A1 (en) * | 2010-03-30 | 2011-10-06 | Hyung Hwa Park | Light emitting device and light unit having the same |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3915707A1 (de) * | 1989-05-13 | 1990-11-22 | Asea Brown Boveri | Kunststoffgehaeuse und leistungshalbleitermodul mit diesem gehaeuse |
| US5948991A (en) * | 1996-12-09 | 1999-09-07 | Denso Corporation | Semiconductor physical quantity sensor device having semiconductor sensor chip integrated with semiconductor circuit chip |
| US5986316A (en) * | 1997-11-26 | 1999-11-16 | Denso Corporation | Semiconductor type physical quantity sensor |
| US6130473A (en) | 1998-04-02 | 2000-10-10 | National Semiconductor Corporation | Lead frame chip scale package |
| JP2000356561A (ja) * | 1999-04-14 | 2000-12-26 | Denso Corp | 半導体歪みセンサ |
| GB2366394A (en) | 2000-08-11 | 2002-03-06 | Kymata Ltd | Integrated optical device with cladding having mesa formation |
| US7968377B2 (en) * | 2005-09-22 | 2011-06-28 | Stats Chippac Ltd. | Integrated circuit protruding pad package system |
| US7662672B2 (en) * | 2006-10-13 | 2010-02-16 | Chipmos Technologies (Bermuda) Ltd. | Manufacturing process of leadframe-based BGA packages |
-
2012
- 2012-08-29 DE DE102012215285.7A patent/DE102012215285A1/de not_active Withdrawn
-
2013
- 2013-08-28 DE DE112013004274.6T patent/DE112013004274B4/de active Active
- 2013-08-28 WO PCT/EP2013/067777 patent/WO2014033152A1/de not_active Ceased
- 2013-08-28 US US14/424,539 patent/US9673136B2/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008038937A1 (en) * | 2006-09-29 | 2008-04-03 | Seoul Semiconductor Co., Ltd. | Luminous element |
| US7524087B1 (en) * | 2007-11-16 | 2009-04-28 | Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. | Optical device |
| US20110241028A1 (en) * | 2010-03-30 | 2011-10-06 | Hyung Hwa Park | Light emitting device and light unit having the same |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102012215285A1 (de) | 2014-03-06 |
| DE112013004274A5 (de) | 2015-05-28 |
| US20150228562A1 (en) | 2015-08-13 |
| US9673136B2 (en) | 2017-06-06 |
| DE112013004274B4 (de) | 2023-11-23 |
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