摘要:
A method of manufacturing a device which starts with a support bar with a first main surface provided with a groove suitable for accommodating a semiconductor element. The groove has walls on which conductor tracks are provided which continue over the first main surface. This method is particularly suitable for making support bars which serve as envelopes for semiconductor elements. The conductor tracks are provided through patterning of a conductive material by means of a patterned photoresist which is provided on the support bar and irradiated from two directions, at such an angle to the first main surface and to the groove that the bottom of the groove is not irradiated, whereas portions of the walls and of the first main surface are irradiated, after which the photoresist and an applied layer of conductive material are brought into a pattern. This method is more reliable than the known method. In the new method, the geometry of the support bar is used for irradiating the photoresist. An edge of the groove screens the bottom of the groove from irradiation. Irradiation from two directions insures that the photoresist on the first main surface and on both walls of the groove is irradiated.
摘要:
A method of manufacturing a device provided with a body with a surface, at least a portion of the surface being provided with a radiation-sensitive layer, after which portions of the radiation-sensitive layer are exposed to radiation through a mask, a first portion of the layer being irradiated directly using a first part of a radiation beam projected through the mask and a second portion of the layer being irradiated indirectly using a second part of the radiation beam projected through the mask and reflected onto the second portion, the radiation beam being substantially collimated.
摘要:
The present invention provides a new type of thin-film capacitor which is insensitive to breakdown voltages during its mounting on a printed circuit board. Said capacitor has an insulating substrate having at least two internal electrode layers which are mutually separated by means of a dielectric layer. The substrate also has two end contacts each of which are electroconductively connected to one of said internal electrode layers. According to the invention, the capacitor also has breakable electrically conductive means, preferably formed as a metal layer, which means are electrically connected to said end contacts. The presence of said breakable electrically conductive means between said end contacts prevents damage due to electrical storage which can arise during the mounting of the capacitor on a printed circuit board.
摘要:
A method of manufacturing partial layers on lamp bulbs, in which method functional layers are provided in thin-film technology, and which method includes at least providing a temporary layer on that region of the lamp bulb which will have no functional layer in the operational state of the lamp, subsequently providing the functional layer on the entire surface of the lamp bulb, and detaching the temporary layer together with the functional layer present thereon.
摘要:
A method of manufacturing a plurality of thin-film, surface-mountable, electronic components, comprising the following successive steps: providing a substantially planar, ceramic substrate having a first and second major surface which are mutually parallel, the substrate containing a series of mutually parallel slots which extend from the first major surface through to the second major surface, such slots serving to subdivide the substrate into elongated segments extending parallel to the slots and located between consecutive pairs thereof, each segment having two oppositely located walls extending along the edges of the adjacent slots, each segment carrying a thin-film electrode structure on at least one of its first and second major surfaces; with the aid of a three-dimensional lithographic technique, providing electrical contacts which extend along both walls of each segment and which make electrical contact with the electrode structure on each segment; severing the segments into individual block-shaped components by severing them along a series of division lines extending substantially perpendicular to the walls of each segment. This method can be used to manufacture various types of component, such as thin-film resistors, fuses, capacitors and inductors, but also passive networks, such as RC and LCR networks.
摘要:
A thin-film capacitor comprises an electrically insulating substrate which is provided with at least two inner electrodes which are separated from each other by means of the dielectric layer. The capacitor also includes two end contacts which each electroconductively contact one of the inner electrodes. The electroconductive contact takes place via a through-connection which communicates exclusively with the main surface of the inner electrode. By virtue of this measure, it is achieved that the contact resistance between the end contacts and the inner electrodes is relatively low and reproducible. As a result, also the value of the ESR of the thin-film capacitor is low, so that the capacitor can very suitably be used for high-frequency applications.
摘要:
A method of manufacturing a plurality of electronic multilayer components is disclosed in which each multilayer component comprises alternately stacked electrically conductive layers and electrically insulating layers, the electrically conductive layers being electrically connected in a periodically alternate arrangement to different edges of the multilayer component. The method comprises the steps of providing a substrate which is endowed with a regular pattern of surface protrusions on one face; depositing individual multilayer components into intervening spaces delimited by the protrusions; depositing electrically conductive layers for connection to a given edge of a multilayer component, wherein each connection occurs at an angle (.theta.) of less than 90.degree. with respect to the substrate face in a direction extending towards the surface protrusion delimiting the respective edge; depositing each electrically insulating layer so as to completely cover a preceding electrically conductive layer; after deposition of the desired multilayer composition, planing the side of the substrate on which deposition occurred so as to expose edges of the electrically conductive layers; depositing a connecting body of electrically conductive material over selected groupings of the exposed edges; and separating completed individual multilayer components from one another by severing the substrate along the surface protrusions.
摘要:
A method of manufacturing a plurality of electronic multilayer component search of which alternately stacked electrically conductive and insulating layers alternately connected to opposite edges of the component, which method comprises: providing a substrate having a face endowed with a regular pattern of substantially parallel elongated protrusions separated by valleys; providing a first and a second flux of electrically conductive material in a direction subtending an angle of less than 90 with the substrate face and extending substantially parallel to the surface protrusions, and covering the thus-formed electrically conductive layers with intervening electrically insulating layers, the first and second fluxes having substantially oppositely directed in-plane components; providing said first and second fluxes with intervening insulating layers in an alternate manner as often as desired; dividing the substrate into strips, each including a protrusion, by severing the substrate along a series of planes, each of which plane extends along a valley in a direction substantially parallel to the protrusions; and providing electrically conductive material upon each resulting exposed side faces of the strips so as to provide a mutual electrical contact between the electrically conductive layers terminating in that exposed side face.