WO2016193071A1 - Optoelektronisches bauelement und verfahren zur herstellung eines optoelektronischen bauelements - Google Patents
Optoelektronisches bauelement und verfahren zur herstellung eines optoelektronischen bauelements Download PDFInfo
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- WO2016193071A1 WO2016193071A1 PCT/EP2016/061709 EP2016061709W WO2016193071A1 WO 2016193071 A1 WO2016193071 A1 WO 2016193071A1 EP 2016061709 W EP2016061709 W EP 2016061709W WO 2016193071 A1 WO2016193071 A1 WO 2016193071A1
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- layer
- semiconductor chip
- vias
- optoelectronic component
- pixel
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- 230000005693 optoelectronics Effects 0.000 title claims abstract description 43
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000004065 semiconductor Substances 0.000 claims abstract description 221
- 229910052751 metal Inorganic materials 0.000 claims description 51
- 239000002184 metal Substances 0.000 claims description 50
- 238000000034 method Methods 0.000 claims description 35
- 238000002955 isolation Methods 0.000 claims description 23
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/18—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof the devices being of types provided for in two or more different subgroups of the same main group of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/50—Multistep manufacturing processes of assemblies consisting of devices, each device being of a type provided for in group H01L27/00 or H01L29/00
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/15—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components having potential barriers, specially adapted for light emission
- H01L27/153—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components having potential barriers, specially adapted for light emission in a repetitive configuration, e.g. LED bars
- H01L27/156—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components having potential barriers, specially adapted for light emission in a repetitive configuration, e.g. LED bars two-dimensional arrays
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/005—Processes
- H01L33/0093—Wafer bonding; Removal of the growth substrate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/02—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
- H01L33/08—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies with a plurality of light emitting regions, e.g. laterally discontinuous light emitting layer or photoluminescent region integrated within the semiconductor body
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/02—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
- H01L33/20—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies with a particular shape, e.g. curved or truncated substrate
- H01L33/22—Roughened surfaces, e.g. at the interface between epitaxial layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/62—Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/64—Heat extraction or cooling elements
- H01L33/642—Heat extraction or cooling elements characterized by the shape
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/64—Heat extraction or cooling elements
- H01L33/647—Heat extraction or cooling elements the elements conducting electric current to or from the semiconductor body
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
- H01L2933/0008—Processes
- H01L2933/0033—Processes relating to semiconductor body packages
- H01L2933/0066—Processes relating to semiconductor body packages relating to arrangements for conducting electric current to or from the semiconductor body
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
- H01L2933/0008—Processes
- H01L2933/0033—Processes relating to semiconductor body packages
- H01L2933/0075—Processes relating to semiconductor body packages relating to heat extraction or cooling elements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/02—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
- H01L33/26—Materials of the light emitting region
- H01L33/30—Materials of the light emitting region containing only elements of Group III and Group V of the Periodic Table
- H01L33/32—Materials of the light emitting region containing only elements of Group III and Group V of the Periodic Table containing nitrogen
Definitions
- An optoelectronic component is specified.
- An object to be solved is to specify an optoelectronic component with a particularly simple geometry of the electrical connections. Another object to be solved is to provide a method for producing such a device.
- Optoelectronic component a semiconductor chip, in a plurality of side by side in the lateral direction
- the semiconductor chip can thus in particular be a pixelated and / or segmented
- Be semiconductor chip Via a radiation exit surface of the semiconductor chip, for example, a parallel to the
- each pixel is part of the
- Radiation exit surface forms, for example, a display.
- the semiconductor chip may comprise, for example, at least 50 or 100 or 200 or 1000 such pixels.
- Radiation exit surface for example, be between 30 ym and 300 ym inclusive.
- the semiconductor chip is a high-resolution display, for example for filling HD
- the pixels may also have lateral dimensions between 2 ym and 5 ym inclusive.
- a semiconductor chip is a separate and separately manageable module that can be plugged or soldered or glued onto a carrier and is contacted electrically in this way.
- the upper side and the lower side form, for example, opposite, substantially parallel main sides of the connecting element.
- the semiconductor chip in a contact region is in direct contact with the top side of the connecting element and is mechanically stably connected to the connecting element via this contact region.
- one of the radiation exit surface opposite mounting side of the semiconductor chip is preferred.
- the contact area is the area, in particular exclusively the area in which solid material of the
- Solid material is preferably non-gaseous material.
- the semiconductor chip can be mechanically displaced by resting in the support region
- the connecting element can be self-supporting or required for mechanical
- this includes
- Connecting layer which is completely penetrated by a plurality of juxtaposed in the lateral direction, metallic, first vias.
- the first vias therefore at least extend from the
- the first vias may be metallic and electrically conductive pins that are inserted through the interconnect layer.
- Metallic here and in the following mean that the corresponding metallic element consists of at least 90% by mass or 99% by mass of metal.
- the connecting layer is contiguous but not simply connected, so it has a hole-like shape
- the first vias are then laterally completely surrounded by the connection layer. For example, in each
- Breakthrough arranged only a first via.
- connection layer forms part of the top side and the bottom side.
- each of the first vias is unique or one-to-one
- the semiconductor chip is mechanically stable and electrical by the connecting element conductive with a directly at the bottom of the semiconductor chip
- Connecting element or the connection layer and the carrier are at the bottom in direct mechanical and possibly electrical contact. Between connecting element or
- Connecting layer and carrier are thus arranged no further metallic or insulating layers.
- Optoelectronic component on a semiconductor chip which in a plurality of side by side in a lateral direction
- the connecting element has a
- contiguous metal interconnect layer which consists of a plurality of laterally juxtaposed metallic first vias
- the connecting layer terminates in the direction perpendicular to the lateral direction flush with the upper side and the lower side.
- Each first via is also uniquely associated with a pixel, electrically connected to that pixel and forms a first electrical contact therewith
- the semiconductor chip is also through the
- Connecting element mechanically stable and electrically connected to a directly located on the underside of the connecting element carrier.
- the invention described here is based on the finding that many electrical connections between the semiconductor chip and a carrier contacting the semiconductor chip must be produced in optoelectronic components with many pixels.
- the metallic compound layer can be used as electrical shielding for the internal
- the connecting element is formed in a metallic manner and rests on the semiconductor chip over a large area.
- connection element can simultaneously serve as a cooling element, in order to effectively prevent the heat generated by the semiconductor chip during operation, for example via the support
- the connecting element may have a supporting and stabilizing effect on the semiconductor chip, which is a detachment of a growth substrate in the semiconductor chip
- the carrier is an active matrix element.
- the active matrix element can be any active matrix element.
- the active matrix element can be any active matrix element.
- the carrier is preferably self-supporting and forms, for example, the stabilizing component for the optoelectronic component.
- the active matrix element has a plurality of
- Each switch can be, for example, a transistor such as a thin-film transistor, in particular a field-effect transistor.
- the active matrix element is a metal-oxide-semiconductor device known as a CMOS device.
- Each switch can then be unambiguously or uniquely associated with a pixel via a first via and be electrically conductively connected to this pixel. In operation, it is then possible to use the switches
- the area of the support area is at least 7/12 or 3/4 or 5/6 of the area of the mounting side of the mounting surface facing the top
- the mounting side extends
- the first contact elements of Semiconductor chips and / or with first contact elements of the active matrix element in direct electrical and mechanical contact are different and independently or separately manufactured elements. That is, the first
- Semiconductor chips and / or the active matrix element may consist of different materials. On the finished component, this can be demonstrated, for example, by virtue of the fact that the first plated-through holes in the direction perpendicular to the lateral direction are not integral with the first
- Active matrix element are formed.
- Sn from a single layer with, for example, Au, Ni, Pt, In or Ti from an adjacent single layer are mixed. In this case lie after the
- Vias and / or the interconnect layer comprise or consist of one or more of the following alloys and / or one or more of the following layer structures: Au x Sny, Cr / Ni x SnyTi z Au w , Ti / PtySn z In x ,
- the letters x, y, w, and z indicate parameters for mixing ratios within the alloys.
- the individual layers separated by a "/" are preferably stacked one above the other in the stated order and in direct contact with one another, the connecting layer and / or the first layer being particularly preferred
- the melting point of the bonding layer and / or the first vias is at least 450 ° C.
- connection layer Vias and / or the connection layer
- Interface is formed. The least two
- Waferbondhabilit connected to each other at the interface Waferbondhabilit connected to each other at the interface.
- the interface then, for example, in comparison to the other areas of the first via or the interconnect layer an increased defect density can be found.
- the individual layers are bonded to each other via covalent and / or metallic bonds
- the interface runs in the process
- the individual layers may be, for example, a material such as gold or copper or silver or nickel or tin or
- the interface may have undulating bumps.
- partial areas of one of the individual layers may extend as individual grains beyond the course of the interface in front of the wafer bonding and into an area of the adjacent ones
- pores and / or the connecting layer porous with a proportion of pores of at least 10% by volume or 20% by volume or 30% by volume.
- pores are understood as meaning, in particular, air-filled or gas-filled bubbles or inclusions within the metallic material of the first plated-through holes and / or the connecting layer.
- Vias may indicate the manufacturing process or the bonding technique of semiconductor chip and carrier. For example, as the starting material for the tie layer and / or for the first
- a metallic sponge are used. During compression, for example thermal pressing, of the metallic sponge, this sponge collapses and forms a firm connection to the carrier and / or the carrier
- Insulation areas filled with gas cavities.
- Through-connection is in the lateral direction of one Completely surrounded by gas such as air.
- the gas then effects the insulation between the bonding layer and the first via.
- insulating material is then not disposed between the first vias and the interconnect layer.
- Insulation areas also be formed by an insulating solid or liquid material, which is then in direct mechanical contact with the first vias and the connecting layer.
- Insulation areas also be formed by an insulating solid or liquid material, which is then in direct mechanical contact with the first vias and the connecting layer.
- Material can be, for example, an organic compound
- Polymer such as parylene or omocer, Benzocyclobutene, short BCB, or a plastic or an inorganic sol-gel material or a silicon oxide, such as S1O2, or a silicon nitride, such as SiN act.
- this consists
- the connecting element then preferably consists only of metal and the gas-filled isolation areas, for example.
- connection layer electrically connected to the semiconductor chip or connected to each pixel.
- the connection layer can, for example, form a common counter contact to the first contacts for all pixels.
- electrons and holes can be injected into the semiconductor chip via the first contacts and via the countercontact. Since the first contacts individually and independently can be controlled from each other, also a common mating contact for all pixels enough to still individual control of all pixels
- connection layer is to one or more second contact elements of the semiconductor chip
- Connection layer electrically isolated from the semiconductor chip and forms no electrical contact with the semiconductor chip.
- the semiconductor chip On the mounting side in the region of the connection layer, the semiconductor chip can then, for example, an insulating
- the insulating layer then covers the connecting layer in plan view and in areas of the first vias the is
- connection layer Connecting element second metallic vias, which are guided by the connection layer and form a mating contact with the first contacts. All the features previously associated with the first
- the second plated-through holes can likewise be metallic pins which are inserted through the holes
- connection layer are guided, are completely surrounded laterally in plan view of the connection layer and electrically from the connection layer through isolation regions are isolated.
- the second plated-through holes can also be arranged on the edge of the component and laterally not completely surrounded by the connecting layer.
- the second plated-through holes are preferably electrically insulated from the first plated-through holes.
- a second via is unambiguously or uniquely assigned to each pixel, is electrically conductively connected to this pixel and forms in each case its own countercontact to the first contact of the pixel.
- Each mating contact is then, for example, individually and independently controlled and electrically isolated from the remaining mating contacts or the other second plated-through holes.
- the pixels can not just about the first
- Through holes are individually and independently controlled.
- Connecting layer thus a plurality of holes, wherein at least one first or exactly one first via and at least one second or exactly one second via is guided through each hole.
- the one in a hole arranged first and second plated-through holes are preferably isolated from each other, but not separated from each other by the connecting layer. According to at least one embodiment, the
- Connecting element has a thickness of at least 0.5 ym or 5 ym or 10 ym. Alternatively or additionally, the thickness of the connecting element is at most 50 ym or 40 ym or 30 ym. The thickness is between the top and the
- Through-holes each have a lateral extent of at least 1 ym or 5 ym or 10 ym or 20 ym.
- the lateral extent of the first plated-through holes is in each case at most 80 ⁇ m or 70 ⁇ m or 60 ⁇ m.
- the distance is at most 50 ym or 40 ym or 30 ym. This distance
- elliptical or round or triangular or square or V-shaped or rectangular cross-sectional areas In general, cross-sectional areas in the form of regular or irregular polygons are conceivable.
- the corners of the polygons are then preferably rounded with radii of curvature of at least 1 ym or 3 ym or 10 ym or 20 ym. Alternatively or additionally, the Radii of curvature at most 100 ym or 50 ym or 10 ym.
- Cross-sectional surfaces are round or elliptical, so that no corners or edges are present at which spikes can build up.
- Semiconductor layer sequence is based, for example, on a III-V compound semiconductor material.
- the semiconductor material is, for example, a nitride compound semiconductor material such as Al n In] __ n _ m Ga m N, or a phosphide compound semiconductor material such as Al n In] __ n _ m Ga m P, or an arsenide compound semiconductor material such as Al n + n ⁇ 1 in] __ n _ m m Ga as, where in each case 0 ⁇ n ⁇ 1, 0 ⁇ m ⁇ 1, and m.
- the semiconductor layer sequence may have dopants and additional constituents. For the sake of simplicity, however, only the essential components of
- Crystal lattice of the semiconductor layer sequence that is, Al, As, Ga, In, N or P, indicated, although these may be partially replaced by small amounts of other substances and / or supplemented.
- the semiconductor layer sequence is preferably based on AlInGaN.
- the active layer has, for example, at least one pn junction and / or one quantum well structure in the form of a single quantum well, in short SQW, or in the form of a quantum well
- the active layer is set up to generate radiation in the UV range and / or blue spectral range and / or visible spectral range and / or infrared range during normal operation.
- the semiconductor chip is free of a growth substrate for the
- semiconductor layer sequence free from a growth substrate means that residues of a growth substrate can still be arranged on the semiconductor layer sequence, but these are not sufficient to stabilize the semiconductor chip alone.
- the remnants of the growth substrate can still form a coupling-out structure on the radiation exit surface of the semiconductor chip.
- the semiconductor chip is not mechanically self-supporting. That is, without additional carrier, the semiconductor chip would break or up to
- the semiconductor chip for example, by the active matrix element and / or the
- Connecting element stabilized and mechanically worn.
- the semiconductor chip itself is free of a stabilizing substrate.
- the active layer of the semiconductor chip runs along the entire lateral Continuous expansion of the semiconductor chip
- the active layer is pierced by contact elements for making electrical contact, so that the active layer runs coherently but not simply coherently.
- Semiconductor layer sequence at least one n-type or a p-type semiconductor layer, which runs along the entire lateral extent of the semiconductor chip contiguous.
- Semiconductor layer sequence include an n-type and a p-type semiconductor layer, wherein, for example, the n-type semiconductor layer is contiguous and the p-type semiconductor layer may be broken.
- the optoelectronic component can, for example, in
- Headlight devices or in interior lighting A use of the device for lighting or illumination of traffic routes is conceivable.
- a method for producing an optoelectronic component is specified.
- the method is particularly suitable for producing an optoelectronic component as described above. That is, all features disclosed in connection with the optoelectronic component are also disclosed for the method and vice versa.
- the method comprises a step A), in which a semiconductor chip is provided, which is in a plurality of in the lateral direction juxtaposed, individually and independently controllable pixels is divided.
- a carrier is provided in a step B).
- step C) becomes a
- the structured metal layer comprises a metallic one
- Connecting layer which is completely penetrated by a plurality of juxtaposed in the lateral direction, metallic first vias.
- the first vias are electrically isolated and spaced by isolation regions from the interconnect layer.
- Semiconductor chip and / or the carrier for example, by means of a structured mask and / or a
- the method comprises a step D), in which the semiconductor chip and the carrier are mechanically and electrically connected via the one or both structured metal layers, so that a metallic layer is formed
- each first via is formed from one or both metal layers.
- steps A) to D) are individually and independently of one another as separate
- the structured metal layer in the form of a solder material is provided in step C), via which the carrier is soldered onto the semiconductor chip.
- the solder material may be in the direction perpendicular to the lateral direction of a multi-layer structure of a plurality of superimposed, different metallic
- the multi-layer structure prior to step D) has one or more of the following layer structures:
- step D) comprises two individual steps D1) and D2), which are carried out, for example, individually and independently of one another in the stated order.
- the semiconductor chip is first temporarily attached to the carrier in step Dl).
- the temporary fastening can take place, for example, via a friction welding method or via a thermocompression method.
- step D2) the semiconductor chip is then inserted over
- Soldering method permanently attached to the carrier. In the soldering process, at least one of the metallic layers within the structured metal layer is melted, whereby a permanent connection to the carrier and / or the semiconductor chip is formed.
- step D 1) is carried out at a temperature which is below one
- step C) in each case a metal layer is applied both to the carrier and to the semiconductor chip.
- step D) the planarized surfaces of the structured
- Waferbond snake interconnected Wafer bonding is in the Generally also known by the term wringing.
- aging at mild temperatures may occur, for example, between 300K and 500K inclusive, which may result in the formation of metallic bonds between the two patterned metal layers and the formation of the connector.
- the method comprises a step in which a growth substrate of the
- the structured metal layer is self-supporting and can remove the substrate from the growth substrate
- Figures 1A to 3B different embodiments of an optoelectronic device in lateral
- Figure 1A shows an embodiment of a
- the device 100 includes a
- Connecting element 2 is mounted on a support 3.
- the connecting element 2 is in direct contact with the semiconductor chip 1 and the carrier 3.
- the semiconductor chip 1 has a semiconductor layer sequence 11 between a mounting side 18 and an opposite radiation exit surface 14.
- the semiconductor layer sequence 11 here comprises a first layer 16 and a second layer 17.
- the first layer 16 is, for example, a p-type layer, the second one
- Layer 17 for example, an n-type layer. But also the opposite dopings are possible.
- an active layer 12 for example in the form of a pn junction, is arranged between the first layer 16 and the second layer 17, an active layer 12, for example in the form of a pn junction, is arranged.
- the semiconductor layer sequence 11 is based, for example, on AlInGaN.
- the active layer 12 can emit electromagnetic radiation in the UV range or in the blue spectral range during normal operation.
- Radiation exit surface 14 forms. This structuring can be used as an optical coupling-out structure to increase efficiency serve. Alternatively, the growth substrate 140 may also be used
- the second layer 17 be structured by an etching process. Also, that can
- Be structured semiconductor layer sequence 11 so that this structuring during the growth process on the semiconductor layer sequence 11 or the second layer 17 transmits and remains after the detachment of the growth substrate 140 in the semiconductor layer sequence 11 or the second layer 17.
- the semiconductor chip 1 is subdivided into a plurality of adjacent pixels 10 in the lateral direction. Each pixel 10 can be controlled individually and independently, so that the radiation exit surface 14 of the semiconductor chip 1 forms, for example, a pixelated display.
- Each pixel 10 can be controlled individually and independently, so that the radiation exit surface 14 of the semiconductor chip 1 forms, for example, a pixelated display.
- Pixel 10 corresponds to one pixel of the display.
- the semiconductor chip 1 has a wiring structure in the form of contact elements 13, 15.
- First contact elements 13 contact the first layer 16, second contact elements 15 serve for
- Contact elements 15 are guided through the first layer 16 and the active layer 12 and open into the second
- Mounting side 18 are contacted from external electrical.
- the first contact elements 13 are of the second
- the mounting side 18 of the half-conductor chip 1 is made of solid along the entire lateral extent
- the connecting element 2 comprises a metallic one
- Connecting layer 22 formed.
- the first plated-through holes 23 are arranged in a lateral direction such that they overlap with the first contact elements 13 of the semiconductor chip 1 and are in direct electrical and mechanical contact with the first contact elements 13. In this case, a first through-connection 23 is uniquely assigned to each first contact element 13. Furthermore, the first contact elements 13 and the first form
- first contact elements 13 and the first plated-through holes 23 are not integrally formed in the direction perpendicular to the lateral direction.
- the first vias 23 are further from the
- Link layer 22 is electrically isolated and spaced by isolation regions 24.
- the isolation regions 24 may be, for example, cavities filled with gas.
- Connection layer 22 is not in direct electrical contact with the semiconductor chip 1. Instead, the semiconductor chip 1 and the connection layer 22 are electrically insulated from one another by an insulation layer 19 located on the mounting side 18 of the semiconductor chip 1.
- Connection layer 22 forms in this case no contact for the semiconductor chip 1, but serves only for
- a second metallic through-connection 25 which is also separated from the connection layer 22 by an insulation region 24, is also introduced into the connection layer 22. Unlike the first vias 23 is the second
- the second through-connection 25 laterally not completely surrounded by the connection layer 22.
- the second through-connection 25 is in direct mechanical and electrical contact with the second contact element 15 of the semiconductor chip 1, so that via the second via 25 the second
- Contact elements 15 and the first layer 16 of the semiconductor layer sequence 11 can be electrically contacted.
- the first vias 24 each form a first contact with the pixels 10, the second
- Through-connection 25 forms a corresponding common counter-contact for all pixels 10.
- the carrier 3 On the underside 21 of the connecting element 2, the carrier 3 is arranged, which is presently designed as an active matrix element with a plurality of switches 30. Each switch 30 is uniquely connected to a first via 23 via a first contact element 33 of the active matrix element and thus assigned to a pixel 10.
- Through connection 25 is electrically conductively connected to a second contact element 35 of the active matrix element 3.
- the switches 30 are, for example, field effect transistors. Each of the pixels 10 can be individually and independently controlled via the switches 30.
- FIG. 1B shows a plan view of the connecting element 2 for a section along the plane ⁇ ⁇ from FIG. 1A. It can be seen here that each of the pixels 10, indicated by the dashed rectangles, a first
- Through hole 23 is associated, which is completely surrounded by the isolation area 24 and the connection layer 22 around.
- Arranged on the edge of the component 100 are the second plated-through holes 25, which are likewise surrounded laterally by the insulation area 24.
- the first plated-through holes 24 are electrical from one another
- the second vias 25, however, are electrically connected to each other at least via the second contact elements 15.
- the first plated-through holes 23 have round or elliptical cross-sectional areas.
- Cross sectional areas of the second vias 25 are composed of semicircles and rectangles.
- Figure 1A shows a sectional view through the device 100 along the dashed plane BB ⁇ of Figure IB.
- Figure IC a similar plan view is shown as in Figure 1B.
- the second plated-through holes 25 are formed in plan view with triangular cross-sectional areas.
- the component 100 has only a single second through-connection 25, which extends along a side surface of the component 100.
- the second via 25 has
- FIG. 2A unlike in FIG. 1A, not only a second plated-through hole 25 is shown, but a second through-connection 25 arranged next to each first through-hole 23.
- the first through-hole 23 and the second through-hole 25 are in a common hole through the Connection layer 22 is arranged.
- the first through-hole 23 and the second through-hole 25 are in a common hole through the Connection layer 22 is arranged.
- the first through-hole 23 and the second through-hole 25 are in a common hole through the Connection layer 22 is arranged.
- the first through-hole 23 and the second through-hole 25 are in a common hole through the Connection layer 22 is arranged.
- the first through-hole 23 and the second through-hole 25 are in a common hole through the Connection layer 22 is arranged.
- connection 23 and the second via 25 are separated by the connection layer 22, but only by the isolation region 24.
- each first via 23 and every second one are formed on the carrier 3.
- each hole within the connection layer 22 is a first one Through connection 23 and a second via 25, which are separated from each other by the isolation region 24.
- the holes within the connecting layer 22 are in the present case round, the first
- Through holes 23 and the second via 25 are each formed elliptical.
- an optoelectronic device 100 is shown in which unlike in the
- connection layer 22 is not electrically isolated from the semiconductor chip 1, but is electrically connected thereto.
- the connection layer 22 forms a common mating contact with the first contacts formed by the first plated-through holes 23 for all pixels 10.
- Link layer 22 is electrically across the second
- FIG. 3B a top view of the
- FIG. 4A shows a first position in a method for producing an embodiment of a
- Optoelectronic device 100 Here, a carrier 3 as described above and a semiconductor chip. 1
- the semiconductor chip 1 differs from the semiconductor chip 1 described above only in that still a semiconductor chip 1 stabilizing
- FIG. 4A shows how a structured metal layer is applied to the mounting side 18 of the semiconductor chip 1.
- the structured metal layer is formed from a connection layer 22, first vias 23 and isolation regions 24.
- connection layer 22 and the first vias 23 are formed of a solder material which
- Insulation regions 24 are formed from a solid, such as glass or plastic or photoresist, so that the structured metal layer shown in FIG. 4A is self-supporting.
- the structured metal layer can then be soldered or glued onto the semiconductor chip 1.
- the application of the structured metal layer can also be done galvanically, for example.
- the isolation regions 24 may be gas-filled cavities in this case.
- FIG. 4B shows a further method step, in which the semiconductor chip 1 with the same applied thereto
- structured metal layer is applied by means of a gripping tool 4 on the support 3, so that the carrier 3 and the structured metal layer are brought into direct contact.
- a friction welding process may be used in which the structured metal layer is temporarily connected to the carrier 3. As shown in Figure 4D, after the temporary
- FIG. 4E a further method step is then shown in which after the permanent connection of the carrier 3 and the semiconductor chip 1, the growth substrate 140 is at least partially detached from the semiconductor chip 1, for example via a laser liftoff process, so that a
- structured radiation exit surface 14 is formed.
- Procedure can not be followed exactly. Rather, these can also be selected with deviations of, for example, +/- 20%.
- the process steps A) to C) take place, for example, in the wafer composite. That is, the semiconductor chips 1 and / or the carriers 3 may each first part of a wafer with a plurality of semiconductor chips 1 and / or
- the wafer can be separated into individual semiconductor chips 1 and / or carriers 3. Connecting the
- Semiconductor chips 1 with the associated carrier 3 in step D) can be embodied as a so-called chip-to-wafer process or wafer-to-wafer process.
- Semiconductor chip 1 around a pixelated chip on AlGalnN basis, wherein the growth substrate 140 based on sapphire.
- the lateral dimensions of the semiconductor chip 1 are 1.6 mm x 1.7 mm, the number of pixels is 256.
- Through-holes 23 have a gold base and an AuSn solder layer with at least 50 at% Sn.
- the carrier 3 has a Ni / Pd / Au surface with a thickness of the Au layer of approximately 20 nm.
- arranged structured metal layer on the support 3 is an ultrasonic friction welding with 0.4 W
- a Si disc of 300 mm diameter is used, which comprises a plurality of the later carrier 3. This Si wafer is equipped with approximately 20,000 of the specified semiconductor chips 1.
- the AuSn layer is melted at 305 ° C in a vacuum brazing furnace by making the AuSn layer liquid with the Au base in a eutectic reaction at 280 ° C.
- the liquid solder wets the Ni / Pd / Au layer, whereby the gold goes into solution and tin from the solder material with the palladium layer forms an intermetallic compound formed. Self - centering or self - oscillation by minimizing the
- the semiconductor chips 1 are then in one
- the connecting element 2 in particular the connecting layer 22, serves here as a cooling plate for the semiconductor chips 1.
- a subsequent laser lift step removes the
- the pixelated semiconductor chip 1 achieves the contrast between neighboring pixels 10 which is useful for practical applications.
- the first vias 23 and the second vias 25 have an Au base with an AuSn solder layer having at least 50 at% Sn content. Also, the connection layer 22 is with this
- Multilayer structure formed. About the first
- Through holes 25 form a common mating contact with the first plated-through holes 23.
- the carrier 3 has a Ni / Pd / Au surface with approximately 20 nm Au. Via ultrasonic friction welding with 4.7 W and a contact pressure 3, 9 N, the semiconductor chip 1 is temporarily fixed on the support 3.
- a Si disk of 300 mm diameter which comprises a plurality of the later carrier 3, is equipped with approximately 15000 semiconductor chips 1.
- the AuSn layer is formed in a vacuum brazing furnace melted at 305 ° C. The liquid solder wets the Ni / Pd / Au layer, with the Au in solution and Sn out of the solder with the palladium layer forming an intermetallic
- connection layer 22 used.
- the Ti layer acts as a temporary one here
- the carrier 3 is coated with a Ni / Au layer, the Au layer being approximately 200 nm thick.
- the semiconductor chip 1 is temporarily fixed on the support 3.
- a Si disk of about 200 mm diameter is used, which has a plurality of the later carrier 3.
- the Si disk is equipped with approximately 9000 semiconductor chips 1.
- the solder material is formed by a Ti / Pt / Sn / In layer system. Again, the asymmetric distribution of the constituents is used.
- the support 3 is coated with a Ti / Pt / Au layer, the Au layer having a thickness of about 3 ⁇ m.
- the semiconductor chip 1 is mounted on the support 3.
- a Si disk of 200 mm diameter is used, which has a plurality of the later carrier 3. This Si disk comes with about 9000
- a Ti / Pt / Sn / Ti / Au layer sequence is used as the solder material.
- the Ti layer acts as a temporary barrier here. Again, an asymmetric distribution of the constituents is used.
- the carrier 3 is coated with a Ni / Au layer, the Au layer being at least 3 ⁇ m thick. About thermocompression at 200 ° C and a contact pressure of 27 N is the
- Bonding layer 22 for example 6 ym wide.
- a pixelated semiconductor chip 1 of approximately 4 mm ⁇ 4.2 mm in area with a number of 1024 pixels 10 is provided.
- Semiconductor chip 1 has a common cathode (second
- connection layer 22 in this case represents the collector potential for the active matrix element
- Through-contacts 25 in this case have a Ti / Ni / Sn / Ti / Au layer sequence.
- the second Ti layer acts as a temporary barrier.
- the semiconductor chips 1 are coated with a Ni / Au layer, the Au layer having a thickness of approximately 0.1 ⁇ m.
- the semiconductor chip 1 is temporarily fixed on the support 3.
- a semiconductor chip 1 is set on a single carrier 3. Subsequently, in a
- Insulation region may in this case, for example, have a width or thickness of 7 ym.
- FIGS. 5A and 5B an alternative manufacturing method to FIG. 4 is shown.
- FIG. 5A is a
- a semiconductor chip 1 as described above is provided with a structured metal layer. Also on the carrier 3, a structured metal layer is applied. The sides of the structured metal layers facing away from the semiconductor chip 1 or the carrier 3 are planarized by a chemomechanical process. Subsequently, the semiconductor chip 1 with the structured metal layer is applied to the structured metal layer of the carrier 3, wherein wafer bonding or wringing occurs. This leads to the formation of a
- connecting element 2 has, for example, an interface with an increased defect density.
- the structured applied to the carrier 3 and to the semiconductor chip 1 are structured
- the semiconductor chip 1 and the carrier 3 are adjusted to each other in the disk assembly.
- the planarized surfaces lead to contact during contact
- a structured one is respectively formed on the carrier 3 and the semiconductor chip 1
- Metal layer applied with chemomechanically planarized surface The semiconductor chip 1 and the carrier 3 are adjusted to each other in the disk assembly.
- the planarized surfaces lead to contact during wringing and
- the individual semiconductor chip 1 has a size of approximately 2.1 mm ⁇ 6 mm and has approximately 3064 pixels.
- connection layer 22 is, unlike in the figures 5, electrically isolated from the semiconductor chip 1.
- second vias 25 are used, which serve as n-contacts. These are arranged on the edge of the connection layer 22 and are not completely surrounded by the connection layer 22.
- the p-contacts, in this case the first plated-through holes 23, have a diameter of about 25 ⁇ m, the Insulation regions 24 around the first vias 23 are approximately 30 ym wide. Overall, the recess
- Through-hole 23 so about 80 ym wide.
- the second vias 25 are housed as a combination of semicircles with 18 ym semicircle diameter and rectangles with side lengths of 18 ym at the edge of the connecting element 2. Outside are the second
- AlGalnN-based semiconductor chip 1 having a sapphire growth substrate 140 is provided. Both on the
- the individual semiconductor chip 1 has a size of approximately 2 mm ⁇ 6 mm.
- connection layer 22 is, unlike in the figures 5, electrically isolated from the semiconductor chip 1.
- Each of the 3064 pixels 10 of the semiconductor chip 1 is individually provided with a p-contact (first through-connection 23) and an n-contact (second through-connection 25).
- each pixel 10 is associated with a circular hole with 80 ym diameter within the connection layer 22.
- a first Through connection 23 and a second through-connection 25 are arranged.
- the first 23 and second vias 25 each have an elliptical cross-sectional shape with 12.5 ym and 25 ym long half-axes.
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Abstract
Description
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Priority Applications (6)
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CN201680031107.XA CN107667436A (zh) | 2015-05-29 | 2016-05-24 | 光电子器件和用于制造光电子器件的方法 |
JP2017559495A JP2018516460A (ja) | 2015-05-29 | 2016-05-24 | オプトエレクトロニクス部品およびオプトエレクトロニクス部品の製造方法 |
US15/578,240 US10475778B2 (en) | 2015-05-29 | 2016-05-24 | Optoelectronic component and method for producing an optoelectronic component |
DE112016002417.7T DE112016002417A5 (de) | 2015-05-29 | 2016-05-24 | Optoelektronisches Bauelement und Verfahren zur Herstellung eines optoelektronischen Bauelements |
KR1020237029800A KR20230130768A (ko) | 2015-05-29 | 2016-05-24 | 광전자 부품 및 광전자 부품을 제조하는 방법 |
KR1020177036387A KR102575338B1 (ko) | 2015-05-29 | 2016-05-24 | 광전자 부품 및 광전자 부품을 제조하는 방법 |
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DE102015108545.3A DE102015108545A1 (de) | 2015-05-29 | 2015-05-29 | Optoelektronisches Bauelement und Verfahren zur Herstellung eines optoelektronischen Bauelements |
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- 2016-05-24 JP JP2017559495A patent/JP2018516460A/ja active Pending
- 2016-05-24 DE DE112016002417.7T patent/DE112016002417A5/de active Pending
- 2016-05-24 WO PCT/EP2016/061709 patent/WO2016193071A1/de active Application Filing
- 2016-05-24 CN CN201680031107.XA patent/CN107667436A/zh active Pending
- 2016-05-24 KR KR1020177036387A patent/KR102575338B1/ko active IP Right Grant
- 2016-05-24 US US15/578,240 patent/US10475778B2/en active Active
- 2016-05-27 TW TW105116627A patent/TWI601305B/zh active
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US10388694B2 (en) | 2016-01-11 | 2019-08-20 | Osram Opto Semiconductors Gmbh | Optoelectronic component, lighting apparatus and car headlight |
US10741723B2 (en) | 2016-07-18 | 2020-08-11 | Osram Opto Semiconductors Gmbh | Component with geometrically adapted contact structure and method for producing the same |
JP2018166224A (ja) * | 2016-12-23 | 2018-10-25 | ルーメンス カンパニー リミテッド | マイクロledモジュール及びその製造方法 |
KR20200003417A (ko) * | 2017-06-12 | 2020-01-09 | 오스람 오엘이디 게엠베하 | 기판상에 반도체 칩을 고정하기 위한 방법 및 전자 컴포넌트 |
KR102305483B1 (ko) | 2017-06-12 | 2021-09-27 | 오스람 오엘이디 게엠베하 | 기판상에 반도체 칩을 고정하기 위한 방법 및 전자 컴포넌트 |
US11315898B2 (en) | 2017-06-12 | 2022-04-26 | Osram Oled Gmbh | Method for fastening a semiconductor chip on a substrate, and electronic component |
US11694977B2 (en) | 2018-05-25 | 2023-07-04 | Osram Opto Semiconductors Gmbh | Method for producing a connection between component parts |
US12068304B2 (en) | 2019-02-14 | 2024-08-20 | Osram Opto Semiconductors Gmbh | Method for producing a component, and component |
Also Published As
Publication number | Publication date |
---|---|
US10475778B2 (en) | 2019-11-12 |
CN107667436A (zh) | 2018-02-06 |
TW201705517A (zh) | 2017-02-01 |
DE112016002417A5 (de) | 2018-03-08 |
JP2018516460A (ja) | 2018-06-21 |
US20180151548A1 (en) | 2018-05-31 |
KR20180013975A (ko) | 2018-02-07 |
DE102015108545A1 (de) | 2016-12-01 |
KR102575338B1 (ko) | 2023-09-05 |
TWI601305B (zh) | 2017-10-01 |
KR20230130768A (ko) | 2023-09-12 |
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