CONNECTION CARRIER, OPTOELECTRONIC DEVICE AND METHOD FOR PRODUCING A CONNECTION CARRIER
20240049383 ยท 2024-02-08
Inventors
Cpc classification
H01L33/62
ELECTRICITY
H05K2201/10121
ELECTRICITY
H05K1/0274
ELECTRICITY
International classification
H05K1/11
ELECTRICITY
Abstract
The invention relates to a connection carrier having at least one contact track which is connected in an electrically conductive manner to a contact surface for electrically contacting a semiconductor component, the contact track having a network structure in at least some locations. The invention further relates to a method for producing a connection carrier having contact tracks.
Claims
1. A connection carrier having at least one contact track which is connected in an electrically conductive manner to a contact surface for electrically contacting a semiconductor component, the contact track having a network structure with a plurality of network tracks in at least some locations, wherein the contact surface has a continuation which extends away from the contact surface.
2. The connection carrier as claimed in claim 1, wherein the network tracks have a width between 2 m and 20 m inclusive.
3. The connection carrier as claimed in claim 1, wherein the network tracks have a height between 1 m and 8 m inclusive.
4. The connection carrier as claimed in claim 1, wherein the network structure is formed at least in some locations by first network tracks running parallel to one another and second network tracks running parallel to one another, wherein the first network tracks and the second network tracks run obliquely or perpendicular to each other.
5. The connection carrier as claimed in claim 4, wherein a longitudinal extension axis of the contact track runs obliquely to the first network tracks and obliquely to the second network tracks, at least in some locations.
6. The connection carrier as claimed in claim 1, wherein in a peripheral region of the network structure and in the direction away from the center of the network structure, a center distance between adjacent first network tracks and/or between adjacent second network tracks is gradually increased and/or the width of the network tracks is gradually reduced.
7. The connection carrier as claimed in claim 1, wherein the contact surface is a flat electrically conductive region.
8. The connection carrier as claimed in claim 1, wherein the contact surface overlaps with at least two network tracks of the network structure.
9. The connection carrier as claimed in claim 1, wherein the contact surface has a continuation which extends away from the contact surface.
10. The connection carrier as claimed in claim 1, wherein the length of the continuation is at least as large as a distance between the first network tracks and/or a distance between the second network tracks.
11. The connection carrier as claimed in claim 1, wherein the network structure along the contact track forms at least two separate current paths within the contact track.
12. The connection carrier as claimed in claim 1, wherein the contact track at least in some locations has a reflection-reducing coating, which in particular contains palladium or molybdenum or copper nitride.
13. The connection carrier as claimed in claim 1, wherein at least one contact track provides an electrical contacting of the semiconductor component and/or wherein at least one contact track provides a capacitive tactile sensor function, wherein the at least one contact track providing the capacitive tactile sensor function is used for the control of the semiconductor component.
14. The connection carrier as claimed in claim 13, wherein at least one contact track is arranged on a first side and/or on a second side of the connection carrier facing away from the first side.
15. An optoelectronic device having a connection carrier as claimed in claim 1 and having an optoelectronic semiconductor component, wherein the optoelectronic semiconductor component is connected in an electrically conductive manner to at least two contact surfaces.
16. The optoelectronic device as claimed in claim 15, wherein electrical connections of the optoelectronic semiconductor component are arranged on a side facing the connection carrier.
17. The optoelectronic device as claimed in claim 15, wherein at least one electrical connection of the optoelectronic semiconductor component is arranged on a side facing away from the connection carrier and connected to the contact surfaces in an electrically conductive manner via a contact conductor.
18. A method for producing a connection carrier with contact tracks, having the steps: a) providing a substrate; and b) forming contact tracks, which have a network structure at least in some locations, on the substrate.
19. The method as claimed in claim 18, wherein before step b) a continuous network structure is arranged on the substrate and the network structure is structured into the contact tracks in step b).
20. The method as claimed in claim 18, wherein the network structure and the contact tracks are formed in a common method step.
21. The method as claimed in claim 18, wherein contact surfaces are formed, which are connected in an electrically conductive manner to a contact track in each case.
22. The method as claimed in claim 18, with which a connection carrier is produced, wherein the connection carrier includes at least one contact track which is connected in an electrically conductive manner to a contact surface for electrically contacting a semiconductor component, the contact track having a network structure with a plurality of network tracks in at least some locations, wherein the contact surface has a continuation which extends away from the contact surface.
23. The connection carrier as claimed in claim 1, wherein the contact track is subdivided into two subregions at a virtual intersection point with a further contact track, wherein the subregions are connected to each other via an electrically conductive bridge, which is electrically insulated from the further contact track
Description
[0054] Further advantages and advantageous features of the invention can be found in the following description of the exemplary embodiments in conjunction connection with the drawings.
[0055] In the drawings:
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[0067] Identical, similar or equivalently functioning elements are labeled with the same reference signs in the figures.
[0068] The figures are all schematic representations and therefore not necessarily true to scale. Instead, individual elements and in particular layer thicknesses can be shown exaggerated in size for better visualization and/or improved understanding.
[0069] The exemplary embodiment shown in
[0070] For example, the contact tracks 2 each connect at least one contact surface 4 to a connection surface 81 of a connection region 8 of the connection carrier 1.
[0071] The connection region 8 is located, for example, on an edge region of the connection carrier 1 and is used for the external electrical contacting of the connection carrier. The network structure 3 in the illustrated exemplary embodiment is formed by first network tracks 31 and second network tracks 32, wherein the first network tracks 31 each run parallel to each other and the second network tracks 32 each run parallel to each other. The first network tracks 31 and the second network tracks 32 run obliquely or perpendicular to each other, in the illustrated exemplary embodiment perpendicular.
[0072] However, a different angle may also be applied. Between the network tracks 31, 32, openings 30 are formed in which the substrate 10 is free of material for the contact track.
[0073] Purely for simplicity of illustration the connection carrier 1 has only two contact tracks 2, each having one contact surface 4, wherein the contact surfaces 4 are designed for electrically contacting a semiconductor component, for example an optoelectronic semiconductor component. Typically, the connection carrier 1 has a plurality of such contact tracks 2, wherein the contact tracks 2 are designed, for example, for electrically contacting 100 or more semiconductor components.
[0074] The contact tracks 2 are electrically insulated from each other by an intervening gap 5. In comparison to a conventionally produced contact track in the form of a continuous solid conductor track, the contact tracks 2 can have a comparatively large transverse extent perpendicular to their longitudinal extension axis 20 in plan view of the connection carrier 1, without the contact tracks 2 being visible to the human eye. The electrical contacting via the contact tracks 2 can therefore be distributed over a comparatively large area, resulting in a homogeneous overall impression to the human eye.
[0075] In particular, the gaps 5 can also be formed sufficiently narrow that they are not perceptible.
[0076] The longitudinal extension axis 20 of the contact track 2 runs, at least in some locations, obliquely to the first network tracks 31 and obliquely to the second network tracks 32, for example at an angle of 45 to each of these network tracks 31, 32. For example, the network tracks 31, 32 have a width w1 between 2 m and 20 m inclusive, for example between 5 m and 15 m inclusive.
[0077] For example, perpendicular to a main extension plane of the connection carrier 1, the network tracks have a height h1 between 1 m and 8 m inclusive, for example between 2 m and 4 m inclusive. An aspect ratio of the network tracks is between 0.2 and 1.5 inclusive, for example.
[0078] For example, a center distance d1 between adjacent first network tracks 31 and/or between adjacent second network tracks 32 is between 50 m and 800 m inclusive.
[0079] The contact surfaces 4 are in each case flat electrically conductive regions with a maximum extent along two mutually perpendicular directions, each of which is larger than the width w1 of a single network track.
[0080] Furthermore, the connection surfaces 81 in the connection region 8 can also be formed by flat electrically conductive regions. This can facilitate the external electrical contactability of the connection carrier 1.
[0081] A suitable option for the substrate 10, for example, is a mechanically rigid substrate, e.g. in the form of a disk or plate, or a mechanically flexible substrate, e.g. in the form of a film. The substrate 10 is electrically insulating. For example, the substrate 10 is transparent in the visible spectral range. For example, the substrate 10 contains a glass or a plastic such as polyethylene, polyimide, polyethylene terephthalate, polyethylene naphthalate or polyacrylic.
[0082] The contact tracks 2 are metallic, for example. For example, the contact tracks 2 contain copper or another metal with high electrical conductivity. To avoid or at least reduce specular reflection, the contact track 2 may have a reflection-reducing coating 25. This is shown schematically in the sectional view of
[0083] The exemplary embodiments shown in
[0084] In the exemplary embodiment shown in
[0085] In the exemplary embodiment shown in
[0086] Of course, the shape or the number of continuations 41 can be varied within wide limits. Such a continuation is particularly expedient if the size of the contact surface 4 is less than or equal to the center distance d1 between the network tracks 31, 32 at least along one direction.
[0087] The exemplary embodiment shown in
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[0091] The optoelectronic device 100 comprises an optoelectronic semiconductor component 9, wherein the optoelectronic semiconductor component 9 is connected in an electrically conductive manner to at least two contact surfaces 4. In the illustrated exemplary embodiment, the optoelectronic semiconductor component 9 has electrical connections 91 on a side facing the connection carrier 1. For example, the optoelectronic semiconductor component 9 is a light-emitting diode in flip-chip geometry. In plan view of the optoelectronic device 100, the optoelectronic semiconductor component 9 overlaps with the associated contact surfaces 4 of the connection carrier 1. The optoelectronic device 100 can comprise a plurality of optoelectronic semiconductor components, for example light-emitting diodes or detectors and optionally further electronic components, which are connected in an electrically conductive manner to associated contact surfaces 4 of the connection carrier 1.
[0092] Such an optoelectronic device 100 can be applied, for example, on a glass plate or embedded between two glass plates. The glass plate can be used, for example, for a building or a motor vehicle. Placement behind a transparent or semi-transparent plastic carrier is also conceivable in order to illuminate the carrier.
[0093] The exemplary embodiment of an optoelectronic device shown in
[0094] Of course, semiconductor components in the geometries described in connection with
[0095] An exemplary embodiment of a method for producing a connection carrier is schematically illustrated in
[0096] Subsequently, contact tracks 2 are formed, which have the network structure 3 at least in some locations. For this purpose, the network structure 3 can be removed in places so that there are gaps 5 between the contact tracks 2. This can be carried out, for example, by laser ablation or by chemical material removal.
[0097] As shown in
[0098] The exemplary embodiment shown in
[0099] The exemplary embodiment shown in
[0100] Alternatively, the width (w1) of the network tracks 31 and 32 can be constant, wherein in the peripheral region 33 and in the direction away from the center of the network structure 3, the center distance (d1) between adjacent first network tracks 31 and the center distance (d1) between adjacent second network tracks 32 is gradually increased.
[0101] As shown in both
[0102] The exemplary embodiment shown in
[0103] The contact tracks 2, which provide the electrical contacting of the semiconductor components 9, and the first 22, second 23 and third 24 electrode are arranged on the same surface of the connection carrier 1 and the substrate 10 respectively. The first electrode 22 is formed by a circular surface. The two contact surfaces 2, which provide the electrical contacting of the semiconductor devices 9, are also arranged around the first electrode 22. In this case, the first electrode 22 and the two contact surfaces 2, which provide the electrical contacting of the semiconductor component 9, are electrically insulated from each other by intervening gaps 5. The contact surfaces 2, which provide the electrical contacting of the semiconductor components 9, are each formed by an annular surface and two incoming conductive surfaces of the network structure 3. A continuous contact surface 2 is thus formed. The two incoming conducting surfaces extend in a straight line and parallel to each other onto the annular surface.
[0104] Around the first electrode 22 and the two contact surfaces 2, which provide the electrical contacting of the semiconductor components 9, two further contact surfaces 2 are arranged, with one contact surface 2 forming a second electrode 23 and one contact surface 2 forming a third electrode 24. At the same time, the second electrode 23 and the third electrode 24 together form a rectangle around the first electrode 22 and the two contact surfaces 2 which provide the electrical contacting of the semiconductor components 9. The second 23 and third electrode 24 are electrically insulated from each other by a gap 5 on the side opposite the incoming surfaces of the two contact surfaces 2, which provide the electrical contacting of the semiconductor component.
[0105] The gap 5 which separates the second electrode 23 from the third electrode 24 runs vertically in a straight line on the two annular surfaces of the contact surfaces 2 that provide the electrical contacting of the semiconductor components 9. The laterally adjacent first electrode 22, the second electrode 23 and the third electrode 24 can be advantageously used for a capacitive tactile sensor function. For example, the exemplary embodiment shown in
[0106] The exemplary embodiment shown in
[0107] To simplify the illustration, the contact surfaces 2 of the connection carrier 1 in
[0108] The first electrode 22 and the laterally adjacent second electrode 23 can be advantageously used for a capacitive tactile sensor function. For example, the exemplary embodiment shown in
[0109] The exemplary embodiment shown in
[0110] In particular, two contact tracks 2 provide electrical contacting of the semiconductor component 9. The semiconductor component 9 is arranged on the two contact tracks 2 which provide the electrical contacting. To simplify the illustration, the two contact tracks 2 in
[0111] In addition to the two contact tracks 2 providing the electrical contacting of the semiconductor component 9, further contact tracks 2 are arranged on the connection carrier 1. In this case, at least one further contact track 2 forms an electrical conductor on the connection carrier 1. The exemplary embodiment shown in
[0112] To simplify the illustration,
[0113] The contact tracks 2, which provide a capacitive tactile sensor function, can have at least two connection surfaces 81. In particular, each contact track 2 providing a capacitive tactile sensor function has exactly two connection surfaces 81. In this case, a first connection surface 81 of the contact track 2 contacts a first connection 91 and a second connection surface 81 of the contact track 2 contacts a second connection 91, wherein the first and second connection 91 are arranged as far apart from each other as possible on a longitudinal extension axis 20 of the contact track 2.
[0114] Alternatively, or in addition thereto, the contact track 2 providing a capacitive tactile sensor function can be electrically contacted at four connections 91 of four connection surfaces 81. For example, the four connection surfaces 81 can connect one contact track 2 at four corners or on four sides.
[0115] The exemplary embodiment shown in
[0116] The exemplary embodiment shown in
[0117] The contact tracks 2 on the first side of the connection carrier 1, which provide a capacitive tactile sensor function, are aligned perpendicular to the contact tracks 2 on the second side of the connection carrier 1. In particular, a plurality of parallel contact tracks 2 thus form a first electrode 22 and a further first electrode 22 on the first side. A plurality of parallel contact tracks 2 thus form a second electrode 23 and a further second electrode 23 on the second side. The first electrode 22 and the further first electrode 22 are arranged on the connection carrier 1 on the same side and in the same plane. The second electrode 23 and the further second electrode 23 are arranged on the connection carrier 1 on a second side in the same plane. In this case, the contact tracks 2 providing an electrical contacting of the semiconductor component 9 on the first side are arranged between the first electrode 22 and the further first electrode 22. Likewise, the contact tracks 2 providing electrical contacting of the semiconductor component 9 on the second side are arranged between the second electrode 23 and the further second electrode 23. The contact tracks 2 of the two first electrodes 22 are arranged perpendicular to and directly above the contact tracks 2 of the two second electrodes 23.
[0118] The invention is not limited by the description based on the exemplary embodiments. Rather, the invention comprises each new feature as well as any combination of features, which includes in particular every combination of features in the patent claims, even if this feature or this combination itself is not explicitly specified in the patent claims or the exemplary embodiments.
LIST OF REFERENCE SIGNS
[0119] 1 connection carrier [0120] 10 substrate [0121] 100 optoelectronic device [0122] 2 contact track [0123] longitudinal extension axis [0124] 21 subregion [0125] 22 first electrode [0126] 23 second electrode [0127] 24 third electrode [0128] 25 reflection-reducing coating [0129] 27 current path [0130] 29 virtual intersection point [0131] 3 network structure [0132] 30 opening [0133] 31 first network tracks [0134] 32 second network tracks [0135] 33 peripheral region [0136] 4 contact surface [0137] 41 continuation [0138] 5 intervening gap [0139] 6 bridge [0140] 65 insulator [0141] 7 contact conductor [0142] 8 connection region [0143] 81 connection surface [0144] 9 semiconductor component [0145] 91 connection [0146] d1 center distance [0147] w1 width [0148] h1 height