EP2041787A1 - Verfahren zur verkapselung elektronischer bauelemente und integrierter schaltungen - Google Patents
Verfahren zur verkapselung elektronischer bauelemente und integrierter schaltungenInfo
- Publication number
- EP2041787A1 EP2041787A1 EP07725728A EP07725728A EP2041787A1 EP 2041787 A1 EP2041787 A1 EP 2041787A1 EP 07725728 A EP07725728 A EP 07725728A EP 07725728 A EP07725728 A EP 07725728A EP 2041787 A1 EP2041787 A1 EP 2041787A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electronic component
- recess
- carrier substrate
- cover layer
- electronic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/02—Containers; Seals
- H01L23/04—Containers; Seals characterised by the shape of the container or parts, e.g. caps, walls
- H01L23/053—Containers; Seals characterised by the shape of the container or parts, e.g. caps, walls the container being a hollow construction and having an insulating or insulated base as a mounting for the semiconductor body
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81C—PROCESSES OR APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OR TREATMENT OF MICROSTRUCTURAL DEVICES OR SYSTEMS
- B81C1/00—Manufacture or treatment of devices or systems in or on a substrate
- B81C1/00015—Manufacture or treatment of devices or systems in or on a substrate for manufacturing microsystems
- B81C1/00222—Integrating an electronic processing unit with a micromechanical structure
- B81C1/0023—Packaging together an electronic processing unit die and a micromechanical structure die
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/0538—Constructional combinations of supports or holders with electromechanical or other electronic elements
- H03H9/0542—Constructional combinations of supports or holders with electromechanical or other electronic elements consisting of a lateral arrangement
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/10—Mounting in enclosures
- H03H9/1007—Mounting in enclosures for bulk acoustic wave [BAW] devices
- H03H9/1014—Mounting in enclosures for bulk acoustic wave [BAW] devices the enclosure being defined by a frame built on a substrate and a cap, the frame having no mechanical contact with the BAW device
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/10—Mounting in enclosures
- H03H9/1057—Mounting in enclosures for microelectro-mechanical devices
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/10—Mounting in enclosures
- H03H9/1064—Mounting in enclosures for surface acoustic wave [SAW] devices
- H03H9/1071—Mounting in enclosures for surface acoustic wave [SAW] devices the enclosure being defined by a frame built on a substrate and a cap, the frame having no mechanical contact with the SAW device
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/12—Structure, shape, material or disposition of the bump connectors prior to the connecting process
- H01L2224/13—Structure, shape, material or disposition of the bump connectors prior to the connecting process of an individual bump connector
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/146—Mixed devices
- H01L2924/1461—MEMS
Definitions
- the present invention relates to the field of electronic components and their associated integrated driver and / or control circuits and more particularly to the mechanical encapsulation of electronic components as well as the encapsulation of electronic components and their associated integrated driver and / or control circuits.
- MEMS micro-electro-mechanical system
- Accelerometer sensors include, for example, a mechanically active component, e.g. As an acceleration-dependent vibration mass, and are based on electromechanical sensors, which translate certain acceleration forms, such as rotational or linear acceleration in corresponding electrical signals. Since such electronic components are very sensitive, they must be protected by being encapsulated in some way. Many technologies have been developed for the fabrication of electronic or other devices for microsystems that allow for the accurate formation of structured encapsulation or passivation layers and / or cavities.
- Typical encapsulation or packaging concepts such as pouring into plastics, are disadvantageous because the mechanical properties of the sensitive components are disturbed or even damaged.
- SAW filter devices even the material on the surface affects the characteristics of the filter devices.
- wafers with corresponding sensitive electronic components are connected to a second wafer or cover wafer.
- the second wafer has holes or trenches in the area or at the location of the electronic components. These holes or trenches of the second wafer are generated in such a way that they after the bonding of the second wafer to the first wafer
- DE 101 47 648 A1 discloses this concept for the production of fan-like structures for a glass cover layer, which is used for the encapsulation of MEMS components.
- DE 102 06 919 A1 discloses a method for encapsulating electronic components, in which a process is used with the following steps: applying the electronic components to a first wafer, producing a frame structure around each electronic component and covering the frame structure with a cover structure, which is placed on a sacrificial layer.
- the frame structure around each electronic component and the cover form a cavity which accommodates and protects the electronic component.
- circuits that are provided outside the chip or at adjacent locations on the chip to enable a desired function, for. B. amplification, resolution and / or signal conversion to be executed.
- the encapsulated electronic component is mounted on a printed circuit board next to the integrated driver and / or control circuit, which is encapsulated in an analogous manner. Together they perform the desired function, eg. B. a measurement function, off. Since the encapsulation of the electronic device and the encapsulation of the integrated circuit are generally considerably larger than the corresponding electronic device or the integrated circuit, the encapsulation contributes considerably to the dimensions and also to the cost of the assembly on the circuit board.
- mounting the electronic device in the package places a limit to how close the electronic device can be placed with respect to the integrated circuit that performs the control and / or driver function.
- the electrical performance of the electronic system can be unnecessarily restricted or the noise susceptibility can be increased.
- WO 01/29529 A2 discloses an encapsulation for micromechanical sensors and associated control circuits.
- the micromechanical sensor is produced on a semiconductor wafer, and the control circuit is produced on a further semiconductor wafer.
- a cavity is etched into the backside of the wafer of the control circuit, the cavity being formed such that the sensor on the other wafer fits into the cavity as the wafers are brought into abutting relationship.
- the object of the present invention is to provide a simple but safe concept of reduced size and reduced cost for encapsulating or accommodating electronic components or electronic components together with their associated integrated driver and / or control circuits, in particular by conventional ones Manufacturing methods for integrated circuits and conventional encapsulation technologies are used.
- the invention proposes a method for encapsulating electronic components, comprising the steps of providing at least one carrier substrate to produce at least one recess in the top side of the carrier substrate comprising at least one stage, at least one first electronic component at least partially on the stage to place, in particular, to support the first electronic component and / or to arrange the first electronic component at a distance from a bottom of the recess, and at least partially cover the top of the carrier substrate with a cover layer.
- the step of covering the upper surface of the carrier substrate with a cover layer results in the formation of a cavity formed by the recess and the cover layer. Accordingly, the first electronic component is received in the cavity.
- the first electronic component is received in the cavity.
- the invention proposes a method for encapsulating electronic components, which comprises the steps of providing at least one carrier substrate, producing at least one recess in the upper side of the carrier substrate, placing at least one first electronic component in the recess, at least one second electronic component on the Top of the carrier substrate, in particular adjacent to the recess to arrange and at least partially cover the top of the carrier substrate with a cover layer.
- Cover also to form a cavity which is formed by the recess and the cover layer. Accordingly, the first electronic component is received in the recess and the second electronic component is simultaneously encapsulated. The encapsulation of the first electronic component and the encapsulation of the second component take place in only one step.
- the recess is also made with at least one stage to support the first electronic component and to arrange the first electronic component at a distance from a bottom of the recess.
- an electronic assembly which has at least one carrier substrate with at least one recess in a top, wherein the recess comprises at least one stage, wherein at least a first electronic component is at least partially disposed on the stage which the first electronic Component in the distance to the bottom of the recess, and wherein a cover layer at least partially covers the top of the carrier substrate.
- the electronic assembly proposed above can be manufactured by a method according to the present invention.
- the electronic assembly comprises a cavity, which accommodates the first electronic component and which is formed by covering the recess with the cover layer.
- the electronic assembly further comprises at least one second electronic component, which is arranged on the upper side of the carrier substrate, in particular adjacent to the recess.
- an electronic assembly comprises at least one carrier substrate with at least one recess in an upper side, wherein at least one first electronic component is arranged in the recess, at least one second electronic component on the upper side of the carrier substrate, in particular adjacent to the recess. is arranged and a cover layer at least partially covers the top of the carrier substrate.
- the electronic assembly proposed above can be manufactured by a method according to the present invention. Accordingly, the electronic assembly includes both a cavity that houses the first electronic component and an encapsulation of the second electronic component, both of which are formed by covering the carrier substrate with the cover layer.
- the recess comprises at least one stage on which the first electronic component is at least partially disposed and through which the first electronic component is arranged at a distance from the bottom of the recess.
- the first electronic component comprises MEMS components such as SAW filter components, quartz components, thermal sensors, pressure sensors and / or
- the first electronic component comprises sensor functional elements, semiconductor functional elements, thermal functional elements, mechanical functional elements and / or optical functional elements.
- the first electronic component according to the invention has a thickness or height in the order of 1 .mu.m up to 1000 .mu.m, preferably of the order of a few dozen .mu.m or 50 .mu.m to a few hundred .mu.m or 200 .mu.m, and a diameter of the order of 1 micron to a few dozen mm, preferably in the order of 10 .mu.m up to 10 mm.
- the carrier substrate may be provided as a semiconductor substrate.
- a silicon semiconductor is provided as the semiconductor substrate.
- a compound semiconductor comprising the materials GaAs, InP, and / or SiGe is provided as the semiconductor substrate.
- a semiconductor characterized by a wide energy gap is used as the semiconductor. The energy gap is in the order of magnitude of 2.5 eV up to 10.0 eV, preferably of the order of 3.0 eV up to 6.0 eV.
- a sapphire is a preferred semiconductor substrate.
- the production of the recess in the upper side of the carrier substrate is effected by a subtractive process, such as, for example, etching, lapping and / or sandblasting.
- the dimensions of the recess are adapted to the dimensions of the first electronic component to be accommodated.
- the dimensions of the recess must be selected so that the first electronic component in
- the recess has a depth in the order of 1 .mu.m up to 1000 .mu.m, preferably in the order of 50 .mu.m up to 200 .mu.m, and a diameter in the order of 1 .mu.m up to a few
- Dozens of mm preferably on the order of 10 microns to 10 mm.
- some embodiments comprise the feature of a recess in which at least one stage is provided to support the first electronic component and to arrange the first electronic component at a distance from a bottom of the recess.
- the dimensions of the step depend on the size of the recess. Accordingly, the height of the step is less than the depth of the recess and the length of the step is less than the diameter of the recess.
- the step has a height in the order of 1 .mu.m up to 400 .mu.m, preferably in the order of 50 .mu.m up to 200 .mu.m, and a length in the Order of 1 micron to a few dozen mm, preferably in the order of 10 microns to 10 mm.
- the steps overall height or the average step height equivalent to about 1 to 80% •%, preferably 10% 'to 60% of the total height of the recess or the mean height of
- the height of the step corresponds to about 20% to 50% of the total height of the recess or the mean height of the recess.
- the length of the step corresponds to about 1% to 80%, preferably 3% to 40% of the total length of the recess or the mean length of the recess. In a particularly preferred embodiment, the length of the step corresponds to approximately 5% to 30% of the total length of the recess or of the mean length of the recess.
- the first electronic component is applied at the stage by gluing, soldering, low-temperature glazing and / or by means of paste, in particular Ag paste.
- the first electronic component can be movably mounted. In a particular embodiment, this type of mounting allows the first electronic component to vibrate.
- the recess is made by varying the parameters of the aforementioned subtractive process to make the recess.
- the stage can be produced in a one-step process or in a multi-step process.
- a one-step process can be realized by means of a lapping tool or a type of lapping punch which has the shape that at least substantially corresponds to the negative shape of the recess and step.
- the application of lapping tools of different sizes and / or shapes corresponds to an example of a multi-step process.
- the second electronic component is provided as an integrated circuit.
- the integrated circuit can be in the form of a solid state or monolithic integrated circuit, as an integrated film circuit and / or as an integrated circuit
- the integrated circuit is provided as an integrated driver or control circuit for the first electronic device.
- the integrated circuit includes both functions, i. H. it represents both an integrated driver and control circuit for the first electronic component.
- the second electronic component is arranged as close as possible to the first electronic component.
- the second electronic component directly adjoins the upper edge of the recess.
- the first electronic component and the second electronic component are electrically connected. This connection is made by wire bonding, soldering and / or metal paste, with the materials Au, Al, PbSn, SnAgCu and / or Ag.
- the assembly or manufacturing method as well as the dimensions of the second electronic component or the integrated circuit depend on its embodiment.
- the second electronic component is mounted on the upper side by gluing, brazing, soldering, low-temperature Anglasen and / or by means of paste, in particular Ag paste, or is prepared by vapor deposition, CVD, sputtering, epitaxial growth and / or doping.
- At least one first electrical contact pad is applied to the upper side of the carrier substrate, in particular adjacent to the recess containing the first electronic component.
- the first electrical contact pad is produced by photolithographic methods using, for example, PVD, in particular by vapor deposition and / or sputtering and / or CVD.
- the materials that form the first electrical contact pad include Au, Al, TiCu, AlSiCu, AlSiTi, W, Cu, and / or AlCu.
- the first contact pad has a thickness of the order of 1 nm to a few tens of ⁇ m, preferably of the order of 100 nm to 1 ⁇ m, and a diameter of the order of 1 ⁇ m to a few hundred ⁇ m, preferably of the order of 10 ⁇ m up to 500 ⁇ m.
- the first electrical contact pad is in particular electrically connected to the first electronic component. This connection is made by wire bonding, soldering and / or metal paste, with the materials Au, Al, PbSn, SnAgCu and / or Ag.
- At least one second electrical contact pad is arranged on the upper side of the carrier substrate, in particular adjacent to the second electronic component, in order to contact the second electronic component.
- the second electrical contact pad may be fabricated using the same methods and materials as mentioned above for the first electrical contact pad become.
- the first and second electrical contact pads are produced simultaneously in one step.
- the second electrical contact pad is electrically connected to the second electronic component. This connection can be carried out analogously to the connection described above between the first electronic component and the first electrical contact pad.
- the carrier substrate is covered by the cover layer or cover in an abutting positional relationship.
- This cover leads to the formation of a cavity through the first electronic component receiving recess.
- both the first electronic component in the recess and the second electronic component is provided on the upper side of the carrier substrate, by the cover of the carrier substrate by means of the cover layer simultaneously both a cavity, the first electronic Receives component, as well as formed an encapsulation for the second electronic component.
- the method according to the invention eliminates the need for a separate encapsulation of electronic components and the integrated circuits corresponding thereto.
- the disclosed encapsulation method advantageously eliminates the need for handling exposed sensors during encapsulation operations and results in closer alignment of the electronic device and associated integrated circuit, reducing costs and providing better system performance using conventional encapsulation technologies can.
- Preferred materials for the cover layer are glass, metal, ceramic, semiconductors and / or plastic and can be provided as a thin layer.
- the cover layer has a thickness in the order of 10 .mu.m up to a few mm, preferably in the order of 100 .mu.m up to 1 mm.
- the cover layer at least partially covers the carrier substrate.
- the diameter of the cover layer substantially corresponds to the diameter of the carrier substrate to be covered.
- a contact side of the cover layer which at least partially touches the top side of the carrier substrate, is flat, d. H. unstructured, provided so that the contact side of the cover layer completely the top of
- the contact side of the cover layer which contacts the upper side of the carrier substrate, is structured, ie. H. it comprises a first recess in the region of the first electronic component.
- the cavity, which accommodates the first electronic component is formed by the recess in the carrier substrate and by the recess in the cover layer.
- the contact side of the cover layer is provided structured in such a way that the contact side comprises a first recess in the region of the first electronic component or a second recess in the region of the second electronic component.
- the contact side of the cover layer is provided structured in such a way that the contact side comprises a first recess in the region of the first electronic component and a second recess in the region of the second electronic component. Accordingly, the contact side of the cover layer becomes structured provided, wherein it comprises at least one recess in the contact side of the cover layer.
- a cavity is also formed by the second recess, which receives the second electronic component.
- the top side of the carrier substrate and the contact side of the covering cover layer are joined together.
- Possible methods for connecting the upper side of the carrier substrate and the contact side of the cover layer with one another are anodic bonding, low-temperature bonding, brazing, gluing, soft soldering and / or glazing, in particular low-temperature glass melts.
- the contact side of the cover layer and / or the upper side of the carrier substrate are each at least partially covered with at least one adhesive layer, and the carrier substrate and the cover layer are connected to each other by means of this at least one adhesive layer.
- the adhesive layer has a thickness in the order of 100 nm to a few dozen microns, preferably of the order of 1 .mu.m up to 10 .mu.m, and a diameter which corresponds in particular substantially to the diameter of the cover layer or of the carrier substrate to be covered.
- both sides, ie the contact side of the cover layer and the top side of the carrier substrate are covered with at least one adhesive layer, and the carrier substrate and the cover layer are connected by means of these adhesive layers. Since it is easy to apply, the adhesive layer completely covers the contact side of the cover layer in a preferred embodiment. 1b
- the adhesive layer has at least one gap or recess.
- the adhesion layer comprises at least one first gap or a first recess in the region of the first electronic component or the recess and / or a second gap or second recess in the region of the second electronic component. Accordingly, the corresponding recess, which receives the first electronic component and / or the second electronic component is not in each case by the
- Adhesive layer covered thereby resulting in the possibility to use electronic components that are sensitive to the adhesive layer.
- the said adhesive layer is realized for example by gluing, brazing, soldering and / or glass layer melting.
- Materials according to the above-mentioned methods for forming the adhesive layer are synthetic resin, preferably epoxy resin and / or acrylic resin, AuSn, PbSn, SnAgCu and / or low-melting-point glass.
- the adhesive layer is made by spin coating,
- the cavity receiving the first electronic component is formed in such a way that the first electronic component and / or the second electronic component are hermetically sealed.
- the first electronic component and / or the second electronic component are each connected between the contact side of the
- Methods for producing the first via hole are etching, lapping and / or sandblasting. If appropriate, photolithographic techniques may be used.
- the via hole or the first via hole is made to a depth such that it allows direct access to the first electrical contact pad. Accordingly, the first via hole has a depth corresponding to the thickness of the carrier substrate and a diameter in the order of 1 .mu.m up to a few hundred .mu.m, preferably in the order of 50 .mu.m up to 200 .mu.m.
- an electrical connection in particular at least one first electrical connection line, is produced.
- Possible methods for producing the first electrical connection line are PVD, for example vapor deposition and / or sputtering, and / or CVD with the materials Au, Al, Cu, AlSi and / or AlCu. If appropriate, photolithographic techniques may be used.
- At least a first solder ball is placed on the first electrical connection line.
- a preferred method for attaching the First solder ball is a reflow process, laser assembly, Au / Au floating process, a bonding process using a conductive thin film and / or Ag soldering. Accordingly, preferred processes involve melting prefabricated solder balls onto the first electrical connection line.
- the first solder ball has a diameter of the order of 10 ⁇ m to a few hundred ⁇ m, preferably of the order of 100 ⁇ m to 500 ⁇ m, and comprises PbSn, SnAgCu and / or ZnSn.
- At least one second via or via hole is formed in the underside of the carrier substrate or in the back of the cover layer, which allows access to the second electrical contact pad.
- the second via electrical hole can be made by the same method and materials as previously mentioned for the first via hole.
- the first and second via holes are made simultaneously in one step. The second via hole allows access to the second electrical contact pad.
- an electrical connection in particular at least one second electrical connection line, is made through the second via hole, leading from the second electrical contact pad to the lower side of the carrier substrate or to the rear side of the cover layer.
- at least a second solder ball is placed on this second electrical connection line.
- the second electrical connection line and / or the second solder ball may be mentioned by means of the same method and the same materials as previously described for the corresponding first electrical connection line or the first solder ball 1 y
- Electrical connections or electrical connection lines between the first contact pads and the first electronic components, between the second contact pad and the second electronic component and / or between the first electronic component and the second electronic component can be determined by means of the same method and the same materials, as previously mentioned for the first electrical connection line.
- the aforementioned photolithographic process for deposition processes includes the steps of coating the support substrate with a photosensitive resist layer, photolithographically patterning the deposited resist layer, coating the prestructured substrate with the corresponding layer comprising the corresponding material, and the resist layer remove.
- the photolithographic patterning step includes exposure by means of a mask and subsequent development.
- the coating step may be carried out by spin coating, spraying, electrodeposition and / or applying at least one photosensitive resist film.
- the step of removing the resist layer is such that at least one layer deposited on the resist layer is also removed.
- the production of via holes or recesses by photolithographic methods can be used in a corresponding manner.
- each chip includes the first electronic device, the cavity, the first electrical contact pad, the first via hole, the first electrical connection line, and the first solder ball.
- the electronic assembly has a thickness in the order of 10 microns to 5 mm, preferably in the order of 100 microns to 1 mm, and a
- each chip comprises the first electronic component, the cavity, the second electronic component, the first electrical component
- the electronic assembly has a thickness in the order of 50 microns to 2 mm, preferably in the order of 100 microns to 1 mm, and a diameter in the order of 500 microns to 20 mm, preferably in the order of 1 mm up to 10 mm.
- the method according to the present invention enables efficient production of encapsulated electronic components as well as encapsulated electronic ones Components and their associated integrated control and / or driver circuits.
- Figure 1 shows a schematic side view of an electronic assembly comprising a first electronic component, which is movably mounted, and a second electronic component.
- FIG. 2 shows a schematic side view of a further electronic subassembly comprising a first electronic component and a second electronic component.
- FIGS. 3.a to 3.w show schematically in a side view the process steps for producing an electronic assembly according to the invention, which contains a first electronic component.
- FIG. 4 schematically illustrates an electronic subassembly which has been produced in accordance with the method illustrated in FIGS. 3 a to 3 w.
- FIGS. 5.a to 5.1 schematically show, in a side view, the process steps for producing an electronic assembly according to the invention, which contains a first electronic component and a second electronic component.
- FIG. 6 schematically shows an electronic assembly which has been produced in accordance with the method illustrated in FIGS. 5 a to 5.1.
- the figures show the feature of a back-side contact.
- the electronic components in particular the first and the second electronic component, are electrically contacted via the rear side 1b of the carrier substrate.
- FIGS. 1 and 2 show a schematic
- the electronic assembly 20 comprises a carrier substrate 1 which has at least one recess 7 in its upper side 1a.
- the carrier substrate 1 is connected to a cover layer 4, which simultaneously forms a cavity in which the first electronic component 61 is accommodated, and an encapsulation for a second electronic component 62, which is arranged adjacent to the recess 7 on the upper side 1a.
- the first electronic component 61 is connected to a first electrical contact pad 91.
- the first electrical contact pad 91 is connected via a first via hole 101 and an in This placed first electrical connection line 31 is connected to a bottom Ib of the carrier substrate 1 and can be connected by a first solder ball 21, for example, with a printed circuit board.
- the second electronic component 62 is connected to a second electrical contact pad 92.
- the second electrical contact pad 92 is connected via a second via hole 102 and a second electrical connection line 32 placed therein to a lower side 1b of the carrier substrate 1 and can furthermore be connected to a printed circuit board by means of a second solder ball 22, for example.
- the first electronic component 61 is mounted on a step 11.
- the first electronic component 61 is movably mounted on the stage 11.
- the first electronic component 61 is mounted or placed directly on the bottom 71 of the recess 7, and the first electronic component 61 can not be set in oscillation.
- the illustrated method demonstrates the encapsulation of electronic components at the wafer level.
- the method for encapsulating electronic components comprises according to FIGS. 3 a to 3 d the first step of providing a wafer or a carrier substrate 1.
- the carrier substrate 1 is a semiconductor substrate.
- the support substrate 1 has a thickness in the order of 50 .mu.m up to 500 .mu.m and a diameter in the order of 4 "up to 12".
- Figur.3. a shows a view of
- FIG. 3.b shows an enlarged (zoomed) view of the detail Z shown in Figure 3.a.
- a subdivision of the wafer is shown in sections Ic.
- FIGS. 3.c and 3.d show a schematic side view or a cross section of the zoom section Z, which is shown in FIG. 3.b, along a section line S.
- the carrier substrate 1 shown has an upper side 1a and a lower side 1b.
- FIGS. 3.d to 3.i illustrate the generation of contact pads, for example the first and second contact pads 91 and 92, respectively, by means of photolithographic methods.
- This comprises the steps of coating the substrate 1 on its upper side 1a with a photosensitive resist layer 2 (FIG. 3.e) and forming recesses 2a by means of photolithographic structuring of the applied layer 2 (FIG. 3.f).
- the upper side 1a of the substrate 1 is coated with a layer 9 of a conductive material, for example a metal such as Au, by a PVD process such as electron beam vapor deposition or sputtering.
- First electrical contact pads 91 are formed on the upper side 1a of the carrier substrate in the recesses 2a (FIG. 3.g).
- the resist layer 2 is lifted off, and the first electrical contact pads 91 remain attached to the upper side 1a (FIG. 1i).
- the distance between the first electrical contact pads 91 is determined by the dimensions of the first electronic component 61 to be mounted or by the division into sections Ic.
- the method for encapsulating electronic components further comprises the step, by means of a subtractive process, which is shown in Figures 3.j and 3.k, at least one recess 7 in one To produce top side 1a of the carrier substrate 1.
- the dimensions of the recess 7 are designed for the dimensions of the first electronic component 61 to be accommodated.
- the dimensions of the recess 7 are selected so that the first electronic component 61 is completely sunk in the recess 7.
- the preparation of the recess 7 is carried out by ultrasonic lapping.
- the dimensions of a lapping tool or a lapping head are determined by the dimensions of the first electronic component 61 to be accommodated in the generated recess 7.
- the recess 7 comprises a step 11 on a bottom 71 of the recess 7.
- the dimensions of the step 11 are determined by the dimensions of the first electronic component 61 to be held and spaced from the bottom 71 of the recess 7.
- the production of the step 11 within the recess 7 or the production of the recess 7 and the step 11 is carried out by lapping in a two-stage process using two Läppköpfe, in particular a first lapping head and a second lapping head 111, the different dimensions corresponding to the dimensions of the recess. 7 and the dimensions of the stage 11 to be manufactured.
- the lapping head 110 is used to produce a first portion 72 of the recess, which reduces the diameter of the entire recess 7 by the length of the step 11.
- the lapping process takes place to the desired depth of the recess 7 or the recess portion 72.
- a second lapping head 111 is used to expand the diameter of the recess 7 by a second recess portion 73 to the desired diameter of the recess 7.
- Another possibility is based on lapping in a one-step process by means of a lapping head having a shape corresponding to the desired shape of the recess 7 and the step 11 or shape of the first lapping head 110 and the second lapping head 111 in combination.
- Components comprises, as a further step, the mounting or placing of a first electronic component 61 in the recess 7 (FIG. 3.1).
- the first electronic component 61 corresponds to an acceleration sensor.
- the first electronic component 61 is movably mounted on the stage 11 by gluing.
- the stage 11 supports the first electronic component 61 and keeps it at a distance from the bottom 71 of the recess 7. Since the first electronic component 61 is mounted only on at least one of its sides, the stage 11 allows the first electronic component 61 to oscillate, to capture an influencing acceleration.
- the first electronic component 61 is electrically connected to the first electrical contact pad 91 by wire bonding with the material Au (FIG. 3.m).
- the method according to the invention further comprises the covering of the upper side 1a of the carrier substrate 1 with a cover layer 4 (FIG. 3.n).
- the carrier substrate 1 is covered by the cover layer 4 in an abutting positional relationship with the aid of an adhesive layer 4, in particular an adhesive layer which is applied to the contact side 4a of the cover layer 4.
- the cover by means of this cover layer 4 leads to the formation of a cavity 75 in which the first electronic component 61 is accommodated.
- a preferred cover comprises a glass plate with a thickness of the order of 10 microns to a few mm and a diameter which substantially corresponds to the diameter of the carrier substrate 1 to be covered. Accordingly, the upper side 1a of the support substrate 1 and a contact side 4a of the covering cover layer 4 are bonded together by gluing. Curing of the adhesive layer 5 can be assisted by irradiation. The adhesive layer 5 can be applied by spin coating and can cover the contact side 4 a of the cover layer 4 substantially completely.
- Adhesive layer 5 has a thickness in the order of 100 nm to a few dozen microns and a diameter which substantially corresponds to the diameter of the cover layer 4 on.
- the arrangement of the first electronic component 61 within the cavity 75 allows for easier handling of the electronic assembly 61 in the subsequent process steps and effective protection of the first electronic component 61, for example, against emerging dust, which is generated in the subsequent process steps.
- the method of encapsulating electronic components comprises, as a subsequent step, providing electrical contact to the encapsulated first electronic components 61 ( Figures 3.q to 3.v). This is achieved by the production of first via holes 101 in the lower side 1b of the carrier substrate 1, which allow access to the first contact pads 91 for contacting the first electronic components 61.
- Step to coat the substrate 1 on its lower side Ib with a photosensitive resist layer 120 (Figure 3.p).
- a photosensitive resist layer 120 By photolithographic structuring of the applied resist layer 120 recesses 120a are formed ( Figure 3.q).
- the lower side 1b of the substrate 1 is treated in a selective etching process, whereby the via holes 101 are produced corresponding to the recesses 120a (FIG. 3.r).
- the corresponding via holes 91 are made to a depth such that they allow direct access to the first electrical contact pads 91.
- the remaining resist layer 120 is removed in a lift-off process (FIG. 3.s).
- First electrical connecting lines 31 are produced by means of a vapor deposition process with Au by means of a photolithographic patterning, as has been described above for the production of the first contact pads 91 (FIG. 3.u).
- first solder balls 21 are placed on the first electrical connecting lines 31 (FIG.
- a preferred method for making the first solder ball 21 is the reflow method.
- the first contact pads 91 and the first solder balls 21 are laterally shifted from each other.
- a vertical projection of the center of the first contact pad 91 and the center of the first solder ball 21 do not coincide.
- the vertical direction corresponds to a direction perpendicular to the top side 1a of the carrier substrate 1.
- FIG. 3.w shows the separation or singulation of the produced wafer composite.
- the composite is separated along dividing lines C. These dividing lines are placed between sections Ic.
- a resulting electronic assembly 20 is shown in FIG.
- the electronic assembly 20 has a thickness in the order of 50 microns to 2 mm and a diameter in the order of 500 microns to 20 mm. It may be mounted, for example, on a printed circuit board, not shown, or on another circuit substrate, not shown, which may, for example, provide power supplies and receive instrument output signals as needed by the system in which they are to be used. Since the connecting lines 31 extend substantially parallel to the rear side Ib from the underside of the filling material 105 to an underside of a projection of the corresponding cavity 75, a compact and space-saving design of the electronic assembly is made possible.
- FIGS. 5.a to 5.1 schematically show a further embodiment of the present inventive method in order to illustrate the process steps associated with the assembly of a first and a second electronic component 61 and 62.
- the production of a second component can also be used for the second component.
- the deposition of the second electrical contact pads 92 takes place in the same oU
- FIG. 5.a shows the carrier substrate 1 after the production of the recesses 7 and the deposition of the first and second electrical contact pads 91 and 92.
- First electronic components 61 for example optical detectors, are arranged on the bottom 71 of the recesses 7 (FIG ).
- Second electronic components 62 are arranged on the upper side 1a of the carrier substrate 1, in particular adjacent to the recesses 7 (FIG. 5.c).
- the second electronic component 62 represents an integrated circuit.
- the integrated circuit is provided as an integrated control circuit for the first electronic component 61.
- the electrical connection of the first electronic component 61 and the second electronic component 62 is shown in FIG. 5 d.
- the electrical connection 81 of the first electronic component 61 with the first electrical contact pad 91 is effected by wire bonding.
- the connection 82 between the second electronic component 62 and the second electrical contact pad 92 is effected by means of metal paste 82.
- the first electronic component 61 and the second electronic component 62 are electrically connected via the connecting line 83, which can likewise be produced by means of a metal paste.
- a further step for encapsulating electronic components corresponds to covering the top side 1a of the carrier substrate 1 with a cover layer 4 (FIGS. 5.e and 5.f).
- the support substrate 1 is supported by the cover layer 4 in abutting relationship by anodic bonding covered.
- a preferred cover 4 is provided as a glass plate or plate that is transparent to at least the radiation to be detected by the first electronic component 61. Accordingly, the cover by means of the cover layer 4 simultaneously leads to the formation of a cavity 75 in which the first electronic component
- FIGS. 5 g and 5 j illustrate the provision of an electrical connection to the encapsulated first electronic components 61 and to the encapsulated second electronic component 62.
- the respective production of the first and second via holes 101 and 102 is shown in FIGS .g to 5.i and corresponds to the production of the first via holes 101, as shown in FIGS. 3.q to 3.sup.s.
- the first via holes 101 and the second via holes 102 allow
- first and second electrical connection lines 31 and 32 are provided or provided in the corresponding via holes 101 and 102.
- the first and second electrical connection lines 31 and 32 may pass through photolithographic patterning according to the above-described preparation of the first contact pads 91 are produced.
- the application of solder balls or the dicing of the wafer corresponds to the application of the solder balls and the dicing of the wafer, as shown in FIGS. 3.v and 3.w.
- the electronic assembly 20 produced after singulation is shown in FIG.
- first electronic component 61 and / or the second electronic component 62 are well protected by the encapsulation in the cavity or the encapsulation between the contact side 4a of the cover layer and the upper side 1a of the substrate, impairment or damage of the electronic components 61 and 62 reduced or even prevented.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Micromachines (AREA)
- Pressure Sensors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006032925A DE102006032925B8 (de) | 2006-07-15 | 2006-07-15 | Elektronische Baugruppe und Verfahren zur Verkapselung elektronischer Bauelemente und integrierter Schaltungen |
PCT/EP2007/004847 WO2008009328A1 (de) | 2006-07-15 | 2007-06-01 | Verfahren zur verkapselung elektronischer bauelemente und integrierter schaltungen |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2041787A1 true EP2041787A1 (de) | 2009-04-01 |
Family
ID=38728650
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP07725728A Withdrawn EP2041787A1 (de) | 2006-07-15 | 2007-06-01 | Verfahren zur verkapselung elektronischer bauelemente und integrierter schaltungen |
Country Status (9)
Country | Link |
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US (2) | US8017435B2 (de) |
EP (1) | EP2041787A1 (de) |
JP (1) | JP2009544161A (de) |
KR (1) | KR20090031360A (de) |
CN (1) | CN101479844A (de) |
AU (1) | AU2007276494A1 (de) |
CA (1) | CA2653918A1 (de) |
DE (1) | DE102006032925B8 (de) |
WO (1) | WO2008009328A1 (de) |
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US7989248B2 (en) | 2009-07-02 | 2011-08-02 | Advanced Microfab, LLC | Method of forming monolithic CMOS-MEMS hybrid integrated, packaged structures |
US8390083B2 (en) * | 2009-09-04 | 2013-03-05 | Analog Devices, Inc. | System with recessed sensing or processing elements |
US9406580B2 (en) | 2011-03-16 | 2016-08-02 | Synaptics Incorporated | Packaging for fingerprint sensors and methods of manufacture |
JP2012204403A (ja) * | 2011-03-23 | 2012-10-22 | Toshiba Corp | 固体撮像装置及びその製造方法 |
CN103107153B (zh) * | 2011-11-15 | 2016-04-06 | 精材科技股份有限公司 | 晶片封装体及其形成方法 |
DE102012202727B4 (de) * | 2012-02-22 | 2015-07-02 | Vectron International Gmbh | Verfahren zur Verbindung eines ersten elektronischen Bauelements mit einem zweiten Bauelement |
US9282642B2 (en) * | 2012-09-28 | 2016-03-08 | KYOCERA Circuit Solutions, Inc. | Wiring board |
US9173024B2 (en) * | 2013-01-31 | 2015-10-27 | Invensense, Inc. | Noise mitigating microphone system |
US9847462B2 (en) | 2013-10-29 | 2017-12-19 | Point Engineering Co., Ltd. | Array substrate for mounting chip and method for manufacturing the same |
CN104332452B (zh) * | 2014-08-20 | 2017-04-19 | 深圳市汇顶科技股份有限公司 | 芯片封装模组 |
DE102015104410B4 (de) | 2015-03-24 | 2018-09-13 | Tdk-Micronas Gmbh | Drucksensor |
KR101689018B1 (ko) * | 2015-04-28 | 2016-12-22 | (주) 씨앤아이테크놀로지 | 포켓을 이용한 반도체 패키지의 전자파 차폐막 형성 방법 |
US9666558B2 (en) | 2015-06-29 | 2017-05-30 | Point Engineering Co., Ltd. | Substrate for mounting a chip and chip package using the substrate |
KR102507947B1 (ko) * | 2015-10-15 | 2023-03-09 | 삼성전자주식회사 | 케이스 및 이를 포함하는 전자 장치 |
DE102016113347A1 (de) | 2016-07-20 | 2018-01-25 | Infineon Technologies Ag | Verfahren zum produzieren eines halbleitermoduls |
DE102019101325A1 (de) * | 2019-01-17 | 2020-07-23 | USound GmbH | Herstellungsverfahren für mehrere MEMS-Schallwandler |
CN111665640B (zh) * | 2019-03-08 | 2022-07-26 | 三赢科技(深圳)有限公司 | 结构光投射模组及其电子装置 |
DE102020100819A1 (de) * | 2020-01-15 | 2021-07-15 | Schott Ag | Hermetisch verschlossene transparente Kavität und deren Umhäusung |
DE102020117194B4 (de) | 2020-06-30 | 2023-06-22 | Schott Ag | Hermetisch verschlossene Umhäusung und Verfahren zu deren Herstellung |
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JPH05121985A (ja) | 1991-10-25 | 1993-05-18 | Seiko Epson Corp | 圧電振動子の製造方法 |
JP3471111B2 (ja) | 1995-03-20 | 2003-11-25 | 三菱電機株式会社 | 半導体装置 |
US5796165A (en) * | 1996-03-19 | 1998-08-18 | Matsushita Electronics Corporation | High-frequency integrated circuit device having a multilayer structure |
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JP3345878B2 (ja) * | 1997-02-17 | 2002-11-18 | 株式会社デンソー | 電子回路装置の製造方法 |
EP0981159A1 (de) * | 1998-08-18 | 2000-02-23 | Siemens Building Technologies AG | Verfahren zur Herstellung einer Mikroverbindung, mikroelektronisches System sowie nach dem Verfahren hergestellter Infrarotdetektor und dessen Verwendung |
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JP3438709B2 (ja) | 2000-08-31 | 2003-08-18 | セイコーエプソン株式会社 | 圧電デバイス及びその製造方法と圧電発振器の製造方法 |
JP2002171150A (ja) | 2000-11-30 | 2002-06-14 | Seiko Epson Corp | 圧電デバイスのパッケージ構造 |
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JP3896285B2 (ja) * | 2002-01-24 | 2007-03-22 | 三菱電機株式会社 | 半導体装置の製造方法 |
DE10206919A1 (de) * | 2002-02-19 | 2003-08-28 | Infineon Technologies Ag | Verfahren zur Erzeugung einer Abdeckung, Verfahren zum Herstellen eines gehäusten Bauelements |
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JP2004271312A (ja) * | 2003-03-07 | 2004-09-30 | Denso Corp | 容量型半導体センサ装置 |
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2006
- 2006-07-15 DE DE102006032925A patent/DE102006032925B8/de not_active Expired - Fee Related
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2007
- 2007-06-01 WO PCT/EP2007/004847 patent/WO2008009328A1/de active Application Filing
- 2007-06-01 JP JP2009519810A patent/JP2009544161A/ja active Pending
- 2007-06-01 AU AU2007276494A patent/AU2007276494A1/en not_active Abandoned
- 2007-06-01 CA CA002653918A patent/CA2653918A1/en not_active Abandoned
- 2007-06-01 EP EP07725728A patent/EP2041787A1/de not_active Withdrawn
- 2007-06-01 CN CNA2007800238963A patent/CN101479844A/zh active Pending
- 2007-06-01 KR KR1020087030560A patent/KR20090031360A/ko not_active Application Discontinuation
- 2007-06-01 US US12/307,174 patent/US8017435B2/en not_active Expired - Fee Related
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2011
- 2011-09-13 US US13/231,844 patent/US8399293B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
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Also Published As
Publication number | Publication date |
---|---|
US20100059877A1 (en) | 2010-03-11 |
US20120003791A1 (en) | 2012-01-05 |
JP2009544161A (ja) | 2009-12-10 |
US8399293B2 (en) | 2013-03-19 |
CN101479844A (zh) | 2009-07-08 |
DE102006032925B4 (de) | 2008-07-31 |
DE102006032925A1 (de) | 2008-01-24 |
AU2007276494A1 (en) | 2008-01-24 |
DE102006032925B8 (de) | 2008-11-06 |
CA2653918A1 (en) | 2008-01-24 |
US8017435B2 (en) | 2011-09-13 |
WO2008009328A1 (de) | 2008-01-24 |
KR20090031360A (ko) | 2009-03-25 |
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