WO2014173590A1 - Verfahren zur herstellung eines optoelektronischen halbleiterchips und optoelektronischer halbleiterchip - Google Patents
Verfahren zur herstellung eines optoelektronischen halbleiterchips und optoelektronischer halbleiterchip Download PDFInfo
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- WO2014173590A1 WO2014173590A1 PCT/EP2014/055528 EP2014055528W WO2014173590A1 WO 2014173590 A1 WO2014173590 A1 WO 2014173590A1 EP 2014055528 W EP2014055528 W EP 2014055528W WO 2014173590 A1 WO2014173590 A1 WO 2014173590A1
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- layer sequence
- carrier
- semiconductor layer
- semiconductor
- semiconductor chips
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/01—Manufacture or treatment
- H10H20/011—Manufacture or treatment of bodies, e.g. forming semiconductor layers
- H10H20/013—Manufacture or treatment of bodies, e.g. forming semiconductor layers having light-emitting regions comprising only Group III-V materials
- H10H20/0133—Manufacture or treatment of bodies, e.g. forming semiconductor layers having light-emitting regions comprising only Group III-V materials with a substrate not being Group III-V materials
- H10H20/01335—Manufacture or treatment of bodies, e.g. forming semiconductor layers having light-emitting regions comprising only Group III-V materials with a substrate not being Group III-V materials the light-emitting regions comprising nitride materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/40—Removing material taking account of the properties of the material involved
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/50—Working by transmitting the laser beam through or within the workpiece
- B23K26/53—Working by transmitting the laser beam through or within the workpiece for modifying or reforming the material inside the workpiece, e.g. for producing break initiation cracks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/0201—Separation of the wafer into individual elements, e.g. by dicing, cleaving, etching or directly during growth
- H01S5/0203—Etching
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/0206—Substrates, e.g. growth, shape, material, removal or bonding
- H01S5/0213—Sapphire, quartz or diamond based substrates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/30—Structure or shape of the active region; Materials used for the active region
- H01S5/34—Structure or shape of the active region; Materials used for the active region comprising quantum well or superlattice structures, e.g. single quantum well [SQW] lasers, multiple quantum well [MQW] lasers or graded index separate confinement heterostructure [GRINSCH] lasers
- H01S5/343—Structure or shape of the active region; Materials used for the active region comprising quantum well or superlattice structures, e.g. single quantum well [SQW] lasers, multiple quantum well [MQW] lasers or graded index separate confinement heterostructure [GRINSCH] lasers in AIIIBV compounds, e.g. AlGaAs-laser, InP-based laser
-
- 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
-
- 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
- H10H20/81—Bodies
- H10H20/822—Materials of the light-emitting regions
- H10H20/824—Materials of the light-emitting regions comprising only Group III-V materials, e.g. GaP
- H10H20/825—Materials of the light-emitting regions comprising only Group III-V materials, e.g. GaP containing nitrogen, e.g. GaN
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/16—Composite materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/16—Composite materials
- B23K2103/166—Multilayered materials
- B23K2103/172—Multilayered materials wherein at least one of the layers is non-metallic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/50—Inorganic materials other than metals or composite materials
-
- 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
Definitions
- the method is used to produce an optoelectronic semiconductor chip.
- the semiconductor chip is preferably a light
- the method comprises the step of providing a carrier assembly.
- the carrier network comprises a multiplicity of individual carriers for the semiconductor chips or for groups of semiconductor chips.
- the individual carriers are mechanically firmly connected to each other.
- the carrier composite is particularly preferably a sapphire wafer.
- the carrier assembly and thus also the carrier for the semiconductor chips are each formed of sapphire.
- the method comprises the step of applying one or more
- the application is particularly preferably a
- the carrier composite and thus the sapphire wafer are then a growth substrate for the semiconductor layer sequence.
- the semiconductor layer sequence can also be applied otherwise to the carrier composite
- the semiconductor layer sequence is preferably based 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 In ] __ n _ m Ga m As, where each 0 ⁇ n ⁇ 1, 0 ⁇ m ⁇ 1 and n + m ⁇ 1.
- the semiconductor layer sequence may have dopants and additional constituents.
- the method comprises the step of dividing the carrier composite and the
- the step of splitting the carrier composite comprises the substep of producing a plurality of selectively etchable material changes in the carrier composite. This generation of material changes takes place in the separation areas preferably by a
- Laser pulses of the laser radiation are in particular femtosecond pulses, picosecond pulses or
- Nanosecond pulses According to at least one embodiment, the
- the dicing of the carrier composite comprises the step of wet-chemical etching of the material changes.
- This wet chemical etching step follows the step of generating the Material changes after.
- etching it is particularly preferred to use only selectively, for example with an etching selectivity of at least 1: 1000 or at least 1: 5000
- the method is configured for producing a plurality of optoelectronic semiconductor chips and comprises at least the following steps:
- Step C) comprises at least the following
- Laser radiation wherein the laser radiation has a wavelength at which the carrier composite is transparent
- Materialabtrage Kunststoff is isolated. The individual process steps are preferably carried out in the order given.
- Sapphire is used as a growth substrate for semiconductor devices in both high frequency and high frequency applications
- Optoelectronics used While sapphire in the form of silicon on sapphire disks is often used in high-frequency technology as a support for a thin silicon layer for the actual components, optoelectronics uses sapphire as a growth substrate for compound semiconductor materials such as AlGalnN.
- Semiconductor layer sequence are to be freed, in particular before separation to avoid damage to the semiconductor layer sequence.
- These separation trenches typically have a width in the order of 50 ⁇ . These trenches represent a lost chip area which leads to higher ones
- Isolated semiconductor chips in an at least two-stage process.
- material changes are induced by laser writing.
- Material changes are efficiently etchable in a second step. Since the laser writing can be a so-called in-volume selective laser etching, ISLE for short, virtually any shaped separating regions and thus side surfaces and shapes of the semiconductor chips can be produced in the carrier assembly. In addition, such separation areas have a narrow width, so that the for the
- Semiconductor layer sequence of semiconductor chips useable surface of a wafer increases.
- the ISLE method can be carried out, for example, as described in the publication Hörstmann-Jungemann et al. in Journal of Laser Micro-Nano Engineering, Volume 5, No. 2, Volume 2010, pages 145-149. The disclosure of this document is incorporated by reference. According to at least one embodiment, the
- the semiconductor layer sequence is also removed in a narrow strip next to the separation regions in which the laser radiation is irradiated.
- a width of the strip lies at the separating regions in which the
- Separation areas themselves, at least 1 ⁇ or 2.5 ⁇ or 5 ⁇ or 7.5 ⁇ . Alternatively or additionally, this width is at most 35 ⁇ or 20 ⁇ or 15 ⁇ .
- Optoelectronic semiconductor chips seen in plan view of a main radiation side, at least two corners, in which meet edges of the semiconductor chip with an angle of 90 °. Preferably, this angle deviates from 90 ° by at least 15 °, 25 ° or 35 ° and / or by at most 75 °, 65 ° or 55 °. In other words, the semiconductor chips then, seen in plan view, no rectangular basic shape.
- lateral surfaces of the carriers are provided with a roughening in step C).
- the side surfaces are, for example, such boundary surfaces of the carrier, which the carrier in directions transverse to a
- the side surfaces can each be completely or only partially provided with a roughening. It is further possible that only some of the side surfaces or all
- the roughening is arranged to improve a light extraction efficiency out of the carrier.
- the roughening preferably has an average roughness, also referred to as R a , of at least 0.25 ⁇ or 0.5 ⁇ .
- R a average roughness
- the average roughness is at most 5 ⁇ or 3 ⁇ or 2 ⁇ .
- Main wavelength English peak wavelength, which is generated during operation of the semiconductor chip radiation.
- the average roughness is then at most 0.5 ym or 0.25 ym or 0.12 ym.
- a mirror layer can be applied to such smooth side surfaces.
- the laser radiation is guided in the separation regions in a zigzag pattern.
- the individual laser pulses are then not on a straight line and / or not in a common plane.
- the separation area may be shaped as a three-dimensional zigzag pattern.
- the term three-dimensional zigzag pattern may mean that the laser radiation is guided similar to the surface of a napkin foam or an egg carton. Such three-dimensional structures, whose
- Main extension directions lie along the separation areas are specifically realized by an ISLE method.
- the roughening on the side surfaces can be generated.
- the separation areas are then arranged obliquely to the growth direction. It is possible that there is exactly one angle of the separation regions to the growth direction per side surface, or that the side surfaces, along the growth direction, have several
- the angle of the separation regions to the growth direction is at least 10 ° or 15 ° or 25 ° or 35 °. Alternatively or additionally, this angle is at most 80 ° or 75 ° or 65 ° or 55 °. According to at least one embodiment, the
- the separation regions are then composed of at least two subregions which have a mean angle to each other of> 0 °.
- Separation areas are semiconductor chips with a trapezoidal cross-section feasible.
- Separation regions shows from a rear side of the carrier composite preferably in the direction of the semiconductor layer sequence and can be an upper side of the carrier composite on which the
- the separation regions are designed symmetrically to the growth direction. According to at least one embodiment, the penetrate
- this depth is at most 90% or 75% or 60% or 40% or 20% or 10% of the thickness, starting from the back and / or from the top.
- Material removal method is removed. This furthermore
- Materialabtrageclar a carrier material over the entire surface, in particular on the entire back, or even only
- the laser radiation is irradiated from the rear side of the carrier composite facing away from the semiconductor layer sequence. This is it
- the mirror layer may be a metal mirror, for example based on aluminum or silver, or else a Bragg mirror with a sequence of alternating layers of low and high refractive index.
- a mechanical integrity of the carrier composite does not become
- each island-shaped laser radiation calculated per impulse of the laser radiation, each island-shaped
- a volume of the generated material change, for example, at least 0.05 ⁇ ⁇ or 0.8 ⁇ ⁇ or 5 ⁇ ⁇ and / or at most 100 ⁇ ⁇ or 50 ⁇ ⁇ or 25 ⁇ ⁇ or 10 ⁇ ⁇ . Due to this comparatively small volumes, the separation area can be targeted and accurately shape.
- the size of the volume is
- the power density is at most 1 x ⁇ - w / cm 2 or 5 x
- an average pulse duration of the pulses of the laser radiation is at most 50 ns or 15 ns or 5 ns. Furthermore, the pulse duration can be at most 1 ns or 500 ps or 5 ps. Alternatively or additionally, the average pulse duration is at least 50 fs or 1 ps or 10 ps or 750 ps.
- this is done
- a proportion of hydrofluoric acid, FH for short, is for example at least 15% or 30% and / or at most 70% or 60%.
- An etching time can vary depending on the thickness of the
- Carrier composite in this process step amount to several hours.
- hydrofluoric acid it is also possible to use certain alkalis.
- the carrier composite prior to the dicing step, is thinned, such as by grinding.
- the thickness of the carrier composite is in the finished semiconductor chip and preferably in the step of Dividing at least 50 ⁇ or 80 ⁇ or 100 ⁇ and / or at most 500 ⁇ or 300 ⁇ or 200 ⁇ or 150 ⁇ . By thinning before the dicing step, the etching time can be reduced.
- crystal quality of the sapphire when irradiating the laser pulses, crystal quality of the sapphire is reduced.
- the laser irradiation converts the crystalline sapphire into amorphous or small-grain polycrystalline alumina. Selective etching is possible by this conversion because the material of reduced crystal quality can have several orders of magnitude less stability to corrosive materials than sapphire itself.
- the mirror may be a metallic mirror such as a silver mirror or an aluminum mirror.
- layer stacks of transparent materials with alternating refractive indices in particular in the form of a Bragg mirror, can be used. Also a combination of a layer of a material with a low refractive indices, in particular in the form of a Bragg mirror, can be used. Also a combination of a layer of a material with a low refractive indices, in particular in the form of a Bragg mirror, can be used. Also a combination of a layer of a material with a low
- Refractive index and a metal mirror applied thereto can be used.
- Such a mirror may optionally also be provided on side surfaces of the semiconductor layer sequence, on a side of the semiconductor layer sequence facing away from the carrier
- the potting body may be a
- the potting body can partially or completely surround the individual semiconductor chips all around. Furthermore, the potting body can
- Main radiation side preferably remains free of the
- the subcarrier After creating the potting body, the subcarrier can be removed.
- the potting body is subdivided, resulting in a plurality of semiconductor components.
- the semiconductor devices each include one or more of the semiconductor chips.
- the semiconductor components each comprise a part of the potting body.
- an optoelectronic semiconductor chip is specified.
- the optoelectronic semiconductor chip is fabricated by a method as recited in connection with one or more of the above embodiments.
- the semiconductor chip has a semiconductor layer sequence based on AlInGaN, which comprises at least one active zone for generating radiation.
- the semiconductor layer sequence is grown on a support made of sapphire. Side surfaces of the carrier have a roughening in places or over the entire surface.
- Semiconductor layer sequence is from the side surfaces
- FIGS 1, 4 and 5 are schematic representations of here
- FIG. 2 shows schematic plan views of exemplary embodiments of optoelectronic semiconductor chips described here
- FIG. 3 is schematic sectional views of FIG
- FIG. 1 shows a method for producing a
- a carrier composite 11 is provided.
- the carrier assembly 11 is a sapphire wafer.
- temporary auxiliary carriers may be used in the method step according to FIG. 1A or in subsequent method steps, not shown.
- a semiconductor layer sequence 2 is epitaxially grown on a top side 72 opposite a rear side 7.
- a growth direction G of the semiconductor layer sequence 2 is oriented perpendicular to the top side 72.
- Semiconductor layer sequence 2 comprises at least one active zone for generating electromagnetic radiation
- the semiconductor layer sequence 2 On a side facing away from the carrier assembly 11, the semiconductor layer sequence 2 has a main radiation side 9. It is possible that at the main radiation side 9 in
- Areas 5 preferably surround the partial regions of the semiconductor layer sequence 2 produced in this method step, in each case around and in the manner of a frame.
- a width of the regions 5 is in particular at most 20 ⁇ .
- Semiconductor layer sequence 2 along the growth direction G is for example at least 2 ⁇ and / or at most 12 ⁇ .
- a protective layer 8 can be applied to the structured semiconductor layer sequence 2.
- Protective layer 8 may be a temporary protective layer which is removed in a later process step. It is also possible that the protective layer 8
- the protective layer 8 is adapted to the
- Semiconductor layer sequence 2 from mechanical damage, to prevent contamination and in particular before an etchant, which is used in a subsequent separation step. Deviating from the illustration, it is also possible that the semiconductor layer sequence 2 to the
- Separation ranges S reaches.
- the carrier assembly 11 may be thinned, for example, by grinding.
- devices for electrically contacting the semiconductor layer sequence 2 can be attached to the semiconductor layer sequence 2 and / or to the carrier assembly 11.
- electrical contact devices such as printed conductors or bond pads are not drawn in each case.
- a pulsed laser radiation L is preferably radiated from the rear side 7 into separation regions S.
- the separating regions S preferably completely penetrate the carrier composite 11 and are furthermore preferably of the Semiconductor layer sequence 2 spaced.
- Each pulse of the laser radiation L changes a specific focus volume in the carrier assembly 11.
- the sapphire of the support composite 11 is locally converted by the laser radiation L in the focus volume in amorphous alumina, which is easier to etch.
- the separation areas S are determined by the individual pulses of
- the laser radiation L preferably does not significantly impair a mechanical integrity of the carrier assembly 11, so that the carrier assembly 11 remains manageable as a whole even after the step according to FIG. 1D.
- a mirror layer 6 is applied in places at the back 7. Individual subregions of the mirror layer 6 are uniquely associated with the subregions of the semiconductor layer sequence 2. The separation areas S are free of the
- Mirror layer 6 It is possible that the mirror layer 6 projects beyond the semiconductor layer sequence 2 in a lateral direction. Deviating from the illustration, the mirror layer 6 can also be applied continuously on the back 7. Furthermore, optionally, the mirror layer 6 may have another, not shown Protective layer to prevent damage to the mirror layer, such as during wet-chemical etching. Such a mirror layer 6 and / or such another
- Protective layer can also be in all others
- the dicing to the individual semiconductor chips 10 takes place, as illustrated in FIG. 1F.
- wet-chemical etching in particular by hydrofluoric acid, the material changed by the laser radiation L is etched away in the separation regions S.
- the weggeussiten areas have the same shape, which was scanned with the pulses of the laser radiation L in the process step of Figure 1D.
- a roughening 4 can be selectively generated on side surfaces 3 of the individual carriers 1 of the semiconductor chips 10. By this roughening 4 is a
- semiconductor chips 10 shown before separating By means of the method, as illustrated in connection with FIG. 1, semiconductor chips 10 having fundamentally arbitrary base areas, as seen in plan view, can be realized. In particular, it does not require the necessary for a break
- the semiconductor chips 10 have a triangular basic shape.
- FIG. 2B shows a hexagonal basic shape and in FIG. 2C a parallelogram-shaped basic shape. Deviating from this, it is not comparable with FIG. 2D
- the semiconductor chips 10 are designed arcuate in FIG 2D. Such semiconductor chips 10 can be used for example in car headlights.
- the basic shape of the semiconductor chips 10 is selected in each case so that a high fill factor can be realized. This is the case with the base areas shown. As a result, the manufacturing costs are reduced.
- Semiconductor chips 10 each have a trapezoidal cross section.
- the separation regions S are designed in V-shape and point towards the semiconductor layer sequence 2. Such a shape on the one hand, a high fill factor of
- the semiconductor chips 10 have a
- the separation areas S are straight line sections seen in cross-section.
- the side surfaces 3 have a first region oriented parallel to the growth direction G and a second region oblique to the growth direction G
- the separation region S is seen in cross-section then in the form of a Y, wherein an opening of the Y to the back 7 has.
- the separation region S is designed in the form of an X, seen in cross section.
- a width of the carrier 1 first increases and then decreases again.
- Such versatile side surfaces 3 are formed by the method of Figure 1, in particular by the scanning with the laser radiation L and the subsequent etching,
- FIG. 4 shows a further exemplary embodiment of a
- Carrier assembly 11 provided. In addition, on the
- Top side 72 contiguous to the semiconductor layer sequence 2 with the at least one active layer over the entire surface
- FIG. 4B shows that several of the separation regions S are formed in the carrier assembly 11.
- the separation regions S extend away from the upper side 72 in the direction of the rear side 7. Starting from the upper side 72, they extend Separation areas S each for example, at least 50 ym or 100 ym and / or at most 200 ym or 150 ym or 100 ym in the carrier assembly 11 into it.
- Carrier composite 11 in total, for example, at
- Separation areas S are generated as described in connection with FIG. 1D.
- a laser radiation is preferably radiated from the rear side 7 into the carrier assembly 11.
- the protective layer 8 and / or the mirror layer 6 can also be structured into electrical connections, redistribution layers or electrical connection surfaces, or corresponding, additional elements can be applied. It can also be an electrical interconnection between adjacent areas of the
- Semiconductor layer sequence 2 are provided for adjacent semiconductor chips 10.
- the semiconductor layer sequence 2 as well as the protective layer 8 and the mirror layer 6 are removed in a region 5, for example by means of etching.
- This step can be done analogously to FIG.
- the region 5 preferably extends beyond the separation region S in the lateral direction.
- further layers can also be produced on the region 5 and on exposed side surfaces of the semiconductor layer sequence 2, for example encapsulation layers and / or electrical insulation layers.
- the etching of the separation regions S takes place. This step is preferably carried out analogously to the method step in FIG. 1F. As shown in Figure 4E, the
- Carrier composite 11 is not completely divided in this etching step.
- a sufficient thickness of the carrier composite 11 preferably remains at the separating regions S, so that the carrier composite 11 is mechanically stable and self-supporting even after the material removal from the separating regions S and can be handled without an auxiliary carrier.
- Etching agent can then take place through holes from the back 7 ago.
- the etching of the separation regions S does not need
- a further mirror layer 6 is applied to the side surfaces 3 of the later carrier 1 in the separating regions S.
- Mirror layer 6 can be applied to all surfaces that are exposed by the material removal in the separation areas S. Unlike shown, it is also possible for the further mirror layer 6 to extend on side surfaces of the semiconductor layer sequence 2 and / or on exposed regions of the protective layer 8. At the other
- Mirror layer 6 may be a metal mirror. It is also possible that a composite of a layer of a material with a low refractive index in Combination with a metal layer as another
- Mirror layer 6 is applied. In order to achieve a high reflectivity of the further mirror layer 6, the
- Semiconductor layer sequence 2 or on the mirror 6 on the semiconductor layer sequence 2 extend.
- Such layers can be treated with gap-passing coating methods such as
- Vapor deposition or atomic layer deposition, short atomic layer deposition or ALD are generated.
- a physical vapor deposition can be used.
- additional metal layers can be applied via an electrochemical deposition, if an electrical
- conductive, in particular thin base layer is present.
- FIG. 4G it is shown that on a side facing away from the carrier composite 11 side of the semiconductor layer sequence 2 a
- Subcarrier 12 is attached.
- the subcarrier 12 is, for example, a foil or a foil
- the auxiliary carrier 12 may be mechanically flexible or mechanically rigid.
- the carrier assembly 11 is removed from the rear side 7, for example by grinding or by lapping.
- the carrier assembly 11 is removed over the whole area until the semiconductor chips 10 are separated. In other words is thinned at least up to the separation areas S inside.
- the resulting semiconductor chips 10 emit the radiation generated during operation via the carrier 1. It is possible that the radiation generated during operation
- the side which is designated in FIG. 4H as the main radiation side can also be provided with a
- Semiconductor layer sequences 2 which is then preferably free of a reflective layer. Further, it is possible that the semiconductor chips 10 as a side emitter, as well as side looker, be designed. In this case, both main sides of the semiconductor chips 10 are preferable
- the semiconductor chips 10 are designed as flip chips, then the semiconductor chips 10 can be arranged, for example, before the
- Contact electrodes are provided, in particular as a
- Solidus temperature of a solder can be maintained.
- Subcarrier 12 is preferably subsequently removed.
- the semiconductor chips 10 it is possible for the semiconductor chips 10 to be encapsulated with a potting compound 13 before the removal of the auxiliary carrier 12, and / or for a not-drawn one to be formed over the main radiation sides 9
- Conversion means for a complete or partial conversion of the radiation generated in the semiconductor layer sequence 12 in a radiation of a different wavelength
- the separation regions S can have a comparatively large width in order to simplify separation after casting of the semiconductor chips 10 into individual, surface-mountable semiconductor components 30. Separation to the semiconductor components 30 takes place
- such a sawing path T can be kept comparatively narrow, thereby increasing a yield of semiconductor components 30 per carrier assembly 11, accompanied by a reduction in the production costs of the semiconductor chips.
- Semiconductor components 30 can be produced, the one
- Sapphire support substrate 1 with mirrored side surfaces 3 have.
- Semiconductor devices 30 have comparatively small lateral dimensions. In particular, with a casting, as explained in connection with Figure 5A, are hunched
- Semiconductor chips 10 can be achieved whose size does not differ greatly from a size of the semiconductor layer sequence 2, seen in plan view. Such designs are also known as chip Size Package. This design can, as shown in Figure 5A, still produce in the wafer composite.
- Printed circuit board can be applied without an additional housing or a potting body is needed. Such an arrangement is also referred to as chip-on-board.
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Abstract
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Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201480022502.2A CN105122472B (zh) | 2013-04-26 | 2014-03-19 | 用于制造光电子半导体芯片的方法和光电子半导体芯片 |
| DE112014002166.0T DE112014002166A5 (de) | 2013-04-26 | 2014-03-19 | Verfahren zur Herstellung eines optoelektronischen Halbleiterchips und optoelektronischer Halbleiterchip |
| US14/773,921 US9680049B2 (en) | 2013-04-26 | 2014-03-19 | Method for producing an optoelectronic semiconductor chip and optoelectronic semiconductor chip |
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|---|---|---|---|
| DE102013104270.8 | 2013-04-26 | ||
| DE201310104270 DE102013104270A1 (de) | 2013-04-26 | 2013-04-26 | Verfahren zur Herstellung eines optoelektronischen Halbleiterchips und optoelektronischer Halbleiterchip |
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| WO2014173590A1 true WO2014173590A1 (de) | 2014-10-30 |
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| PCT/EP2014/055528 Ceased WO2014173590A1 (de) | 2013-04-26 | 2014-03-19 | Verfahren zur herstellung eines optoelektronischen halbleiterchips und optoelektronischer halbleiterchip |
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| PCT/EP2014/055527 Ceased WO2014173589A1 (de) | 2013-04-26 | 2014-03-19 | Verfahren zur herstellung eines optoelektronischen halbleiterchips und optoelektronischer halbleiterchip |
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| CN (1) | CN105122472B (de) |
| DE (2) | DE102013104270A1 (de) |
| WO (2) | WO2014173589A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018109060A1 (de) * | 2016-12-15 | 2018-06-21 | Osram Opto Semiconductors Gmbh | Bauteil mit einem optoelektronischen bauelement |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014110071A1 (de) | 2014-07-17 | 2016-01-21 | Osram Opto Semiconductors Gmbh | Verfahren zur Herstellung eines optoelektronischen Halbleiterbauteils und optoelektronisches Halbleiterbauteil |
| JP6265175B2 (ja) * | 2015-06-30 | 2018-01-24 | 日亜化学工業株式会社 | 半導体素子の製造方法 |
| JP2017135246A (ja) * | 2016-01-27 | 2017-08-03 | ルネサスエレクトロニクス株式会社 | 半導体装置およびその製造方法 |
| DE102016111058A1 (de) | 2016-06-16 | 2017-12-21 | Osram Opto Semiconductors Gmbh | Verfahren zur Herstellung eines Laserdiodenbarrens und Laserdiodenbarren |
| JP6669144B2 (ja) * | 2016-12-16 | 2020-03-18 | 日亜化学工業株式会社 | 発光素子の製造方法 |
| DE102017100997A1 (de) * | 2017-01-19 | 2018-07-19 | Osram Opto Semiconductors Gmbh | Halbleiterlaser und Verfahren zur Herstellung eines solchen Halbleiterlasers |
| JP6504194B2 (ja) * | 2017-03-31 | 2019-04-24 | 日亜化学工業株式会社 | 発光素子の製造方法 |
| US10497838B2 (en) * | 2018-04-12 | 2019-12-03 | Osram Opto Semiconductors Gmbh | Method for producing an optic device, optic device and assembly comprising such an optic device |
| DE102018111319A1 (de) | 2018-05-11 | 2019-11-14 | Osram Opto Semiconductors Gmbh | Optoelektronisches Halbleiterbauelement und Verfahren zur Herstellung eines optoelektronischen Halbleiterbauelements |
| DE102021119999A1 (de) * | 2021-08-02 | 2023-02-02 | OSRAM Opto Semiconductors Gesellschaft mit beschränkter Haftung | Halbleiterlaser und projektor |
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Also Published As
| Publication number | Publication date |
|---|---|
| US9680049B2 (en) | 2017-06-13 |
| WO2014173589A1 (de) | 2014-10-30 |
| CN105122472A (zh) | 2015-12-02 |
| US20160027959A1 (en) | 2016-01-28 |
| DE112014002166A5 (de) | 2016-01-07 |
| DE102013104270A1 (de) | 2014-10-30 |
| CN105122472B (zh) | 2018-06-05 |
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