摘要:
A field effect transistor (T) of the (quasi-)vertical type, which means that in the semiconductor body (10) of the transistor (T), a source (1) and a drain (3) are positioned (approximately) above each other and are separated from each other by the channel region (2), which is connected to a gate region (4), each one of said regions being connected to a connection conductor (6, 7, 11) joining a connection region (7, 8, 12). The connection regions (7, 8) of the source (1) and the gate (4) are situated on top of the semiconductor body (10). The semiconductor body (10) is provided with a through-hole (9) at least one wall of which is covered with a conductive layer (11), which is connected to the drain (3), and which forms the connection conductor (11) of the drain (3) and which is connected to the connection region (12) for the drain (3) situated on top of the semiconductor body (10). In this way, the transistor (T) is very well suited for surface mounting and is also very easy to manufacture. The through-hole (9) can be made by means of a cheap technique, such as laser cutting or sandblasting. Moreover, the transistor (T) is insensitive to the thickness of the channel region (2), which, in addition, may be comparatively thick. This simplifies the manufacture thereof and renders the transistor (T) suitable for both high power and high voltage applications. An additional advantage is that the transistor (T) can be manufactured without using a comparatively expensive epitaxial process.
摘要:
The invention relates to a method of manufacturing a semiconductor device (10), wherein a semiconductor element (1) provided with a number of connection regions (2) is fitted between a first, electroconductive plate (3) and a second plate (4), wherein two connection conductors (3A, 3B) are formed, from the first plate (3), for the two connection regions (2A, 2B) of the element (1), wherein a passivating encapsulation (5) is provided between the plates (3, 4) and around the element (1), and wherein the device (10) is formed by applying a mechanical separating technique in two mutually perpendicular directions (L, M).In a method according to the invention, the connection conductors (3A, 3B) are formed by providing a mask (6) on the first conducting plate (3) in such a manner that a part (3C) of the plate (3) situated between the connection regions (2A, 2B) remains exposed, which part is subsequently removed by etching. Such a method enables a very compact discrete or at least semi-discrete semiconductor device (10) to be readily obtained at low cost, while a high yield is achieved. In a preferred embodiment, also further parts (3D) of the conducting plate (3) situated at the location where the device (10) is to be sawn, cut or broken remain uncovered by the mask (6) and are removed during etching.
摘要:
The invention relates to a method of manufacturing a semiconductor device (10), wherein a semiconductor element (1) provided with a number of connection regions (2) is fitted between a first, electroconductive plate (3) and a second plate (4), wherein two connection conductors (3A, 3B) are formed, from the first plate (3), for the two connection regions (2A, 2B) of the element (1), wherein a passivating encapsulation (5) is provided between the plates (3, 4) and around the element (1), and wherein the device (10) is formed by applying a mechanical separating technique in two mutually perpendicular directions (L, M).In a method according to the invention, the connection conductors (3A, 3B) are formed by providing a mask (6) on the first conducting plate (3) in such a manner that a part (3C) of the plate (3) situated between the connection regions (2A, 2B) remains exposed, which part is subsequently removed by etching. Such a method enables a very compact discrete or at least semi-discrete semiconductor device (10) to be readily obtained at low cost, while a high yield is achieved. In a preferred embodiment, also further parts (3D) of the conducting plate (3) situated at the location where the device (10) is to be sawn, cut or broken remain uncovered by the mask (6) and are removed during etching.
摘要:
The electronic device (100) comprises a body (20) with a cavity (30) wherein a semiconductor element (10) and a thermally conductive layer (33) are present. The cavity (30) is filled with an encapsulation (35) of an electrically insulating material wherein contact faces (47, 48) are mechanically anchored.
摘要:
An electronic device includes an electronic component 2, 3, such as a SAW (=Surface Acoustic Wave) filter 2, 3 having connection areas 4, 5. The filter 2, 3 is sealed off from the environment by means of a cover 6 forming a cavity 7 above the filter 2, 3. According to the invention, the cover 6 is formed by a lacquer layer 6A which is provided, at the location of the filter 2, 3, with an opening 7′ and which is covered with a photoresist layer 6B closing the opening 7′ such that the cavity 7 thus formed has a thickness above zero everywhere above the filter 2, 3. This enables an accurate and stable frequency selection by means of the filter 2, 3 and allows the device according to the invention to be very compact and easy to manufacture. Thus, the device according to the invention is very suitable for use in an application such as a mobile telephone, also after integration of the device with a semiconductor device. The photoresist layer 6B and the lacquer layer 6A preferably contain further openings 8, at the location of the connection regions 4, 5, which are provided with bumps 9, preferably solder bumps 9. Preferably, the photoresist layer 6B includes a solid foil 6B, which is solder-repellent.
摘要:
A method for transferring an electronic component supported by a carrier to a desired position on a substrate include moving the carrier supporting the component relative to the substrate while the component is present on a side of the carrier facing towards the substrate, with the component is positioned opposite the desired position on the substrate. Then, a light beam is directed at the carrier, at the location of the component, from a side remote from the substrate, as a result of which a connection between the component and the carrier is broken and the component is transferred from the carrier to the substrate.
摘要:
The invention relates to an opto-electronic input device (10), wherein the input is formed by detected movements of an object (M), which opto-electronic input device is provided with an optical module (11) comprising at least one laser (1) mounted on a carrier plate (4), which laser emits a radiation beam (S) that is guided to a plate (V) close to the object (M) and, after reflection therefrom, causes a change in the resonant cavity of the laser (1) which is representative of the movement of the object (M), and which is measured within the module (11). According to the invention, the plate (V) close to the object (M) comprises, within a projection of the object (M), a first portion (VI) through which the beam (S) can pass and which has a fixed position with respect to the carrier plate (4), and a second portion (V2) which is movable in a direction perpendicular to the carrier plate (4) and which comprises signal means which, when they are moved, provide a signal that is observable by a user of the device (10). In this way, the device (10) provides feedback to a human user through his tactile sense and preferably also through his auditory sense. The invention also comprises a method of manufacturing such a device and a method of inputting the movement of an object (M) using such a device.
摘要:
For the production of a SLM device, one mounts a spatial light modulator (SLM) (2) on a substrate (3) of the same material as the main material of the SLM (2) to be juxtaposed with the substrate (3). Particularly, silicon based SLMs (2) are mounted on a silicon substrate (3). This leads to arrays of SLMs (2) that maintain a high accuracy with respect to position of the SLMs (2) and planarity. To further improve the planarity, it is preferred to mount the SLMs (2) on the substrate (3) by soldering, using the self-aligning effect of solder connections (20).
摘要:
The present invention relates to a LED module (10) comprising a substrate (12), at least one LED chip (20) mounted on a first side of said substrate, and an optical element (21) covering the LED chip(s) (20). The substrate (12) is further provided with at least one via channel (22) extending from the first side of the substrate to a second opposite side of the substrate, whereby the via channel(s) is provided with conducting means for electrically connecting the at least one LED chip (20) to a control circuit (32). By providing the substrate with via channels with conducting means, the control circuit may be connected at the second side (the bottom side) or at the edge of the substrate. Thus, no top mounted electrical interface is required from the substrate, which is advantageous with respect to miniaturization, light emission, etcetera.
摘要:
The invention relates to the manufacture of a semiconductor device (10) which is suitable for surface mounting of a semiconductor body (1) provided with connection regions (2) for, for example, a diode.In a method, a flexible foil (6) comprises a conductor pattern (4) and an insulating layer (3), and is detachably secured, on the side of the conductor pattern (4), to a substrate (7).