摘要:
An image sensor is packaged by attaching the image sensor to a substrate, forming metallic bumps on either the image sensor or a transparent cover, where the metallic bumps are formed in a pattern around the perimeter of the active area of the image sensor. The transparent cover is then glued to the image sensor at the metallic bumps. Electrical connections are formed between the image sensor and the substrate using, for example, conventional wire bonding techniques. The electrical connections are encapsulated within an epoxy for protection. In an embodiment, multiple image sensors are packaged together on the same substrate and separated into individually packaged image sensors by, for example, sawing.
摘要:
A circuit element having a heat-conducting body having top and bottom surfaces, and a die having an electronic circuit thereon is disclosed. The die includes first and second contact points for powering the electronic circuit. The die is in thermal contact with the heat-conducting body, the die having a bottom surface that is smaller than the top surface of the heat-conducting body. The first contact point on the die is connected to a first trace bonded to the top surface of the heat-conducting body. An encapsulating cap covers the die. The first trace has a first portion that extends outside of the encapsulating cap and a second portion that is covered by the encapsulating cap. The heat-conducting body is preferably constructed from copper or aluminum and includes a cavity having an opening on the first surface in which the die is mounted. The die preferably includes a light-emitting device.
摘要:
A reflection-based optical encoding apparatus for the detection of position and/or motion of a mechanical device includes an encoding medium having at least a first reflective portion, and an encoder housing having a light-emitting source and a light-detecting sensor embedded within, the encoder housing being placed in proximity to the encoding medium such that a functional light path can be established from the light-emitting source to the light-detecting sensor via the first reflective portion of the encoding medium. The encoder housing includes a first flat facet positioned between the light-emitting source and the encoding medium, the first flat facet having a first angle relative to a common geometric plane such that light passing from the light-emitting source to the encoding medium is refracted along a first angled path in a manner that the refracted light strikes a desired location of the encoding medium.
摘要:
The light-emitting device includes a light source and a gradient index (GRIN) element. The GRIN element has a cylindrical refractive index profile in which the refractive index varies radially and is substantially constant axially. The GRIN element includes a first end surface opposite a second end surface and is characterized by a length-to-pitch ratio. The GRIN element is arranged with the first end surface adjacent the light source to receive light from the light source, and emits the light from the second end surface in a radiation pattern dependent on the length-to-pitch ratio. Since the radiation pattern depends on the length-to-pitch ratio of the GRIN element, LEDs with different radiation patterns can be made simply by using GRIN elements of appropriate lengths.
摘要:
A light source suitable for surface mounting onto a printed circuit board. The light source includes a planar substrate with a centrally positioned recess. A light emitting diode is mounted in the recess and the substrate is encapsulated by a transparent encapsulant material forming an ellipsoidal dome over the light emitting diode.
摘要:
A semiconductor device includes a light emitting semiconductor die mounted on at least one of first and second electrically conductive bonding pads, which are located on a first major surface of a substrate of the device. The light emitting semiconductor die has an anode and a cathode, which are electrically connected to the first and second electrically conductive bonding pads. The semiconductor device further includes first and second electrically conductive connecting pads, which are located on a second major surface of the substrate. The first and second electrically conductive bonding pads are electrically connected to the first and second electrically conductive connecting pads via first and second electrically conductive edge interconnecting elements.
摘要:
An encoder having a code strip and an emitter-detector module is disclosed. The code strip includes alternating reflective and opaque stripes. The emitter-detector module includes a housing, a lens insert, a light source and a photodetector. Light from the light source illuminates the code strip, and light reflected from the code strip is incident on the photodetector. The lens insert includes a lens that processes light generated by the light source either before the light reaches the code strip or after the light is reflected from the code strip. The lens insert mates with the housing to position the lens at a predetermined point relative to the light source or the photodetector. The housing will accept a plurality of lens inserts, each lens insert having a different lens from the others of the lens inserts.
摘要:
Optical encoders having one or more of a number of disclosed features are disclosed. The features of the optical encoder in accordance with the present invention include a symmetrical (for example, circular) emitter; baffle between the emitter and a detector; double-dome or single-dome encapsulant; multiple detector; and multiple (at least three) data channels.
摘要:
A transfer molding arrangement for encapsulating a substrate with an encapsulating material comprising a bottom mold and a top mold, wherein a space is provided between the top mold and bottom mold for receiving the substrate, and the top mold and/or the bottom mold is/are arranged in such a way that when a clamping force is applied sufficiently strong, the top mold and bottom mold are abutted against each other, thereby distributing the force exerted on the substrate to the top mold and bottom mold.
摘要:
A semiconductor device includes a light emitting semiconductor die mounted on at least one of first and second electrically conductive bonding pads, which are located on a first major surface of a substrate of the device. The light emitting semiconductor die has an anode and a cathode, which are electrically connected to the first and second electrically conductive bonding pads. The semiconductor device further includes first and second electrically conductive connecting pads, which are located on a second major surface of the substrate. The first and second electrically conductive bonding pads are electrically connected to the first and second electrically conductive connecting pads via first and second electrically conductive edge interconnecting elements.