Abstract:
A removable Flash integrated memory module card has a plastic shell and an integral Flash memory module. On the backside of the card, there are exposed contact pads. When the card is inserted into a card-hosting device, the card can communicate with the device through the exposed pads. The manufacturing method includes manufacturing of the memory module and utilizing plastic molding techniques for making the card outer body. The method involves preparing the substrate, mounting the components, testing the module, preparing the molding device, and molding the card body.
Abstract:
An electroplated wire layout for package sawing comprises a substrate with a plurality of chip arrays disposed thereon. A kerf having two scribe lines is disposed between every two chip arrays. Several solder ball pads corresponding to the chip arrays are disposed on a back surface of the substrate. Each solder ball pad has a solder ball electroplated wire extended into a kerf. There is also a kerf electroplated wire disposed in each kerf and above the scribe lines of the kerf in a zigzag way. The kerf electroplated wire is connected with the solder ball pad electroplated wires to achieve electric connection. By changing the shape of the kerf electroplated wire, the kerf electroplated wire can be easily cut off to enhance the yield and reliability and also lower the cost.
Abstract:
Provided is a process for creating vias for a circuit assembly including the steps of (a) applying a curable coating composition to a substrate, some or all of which is electrically conductive, to form an uncured coating thereon; (b) applying a resist over the uncured coating; (c) imaging the resist in predetermined locations; (d) developing the resist to expose predetermined areas of the uncured coating; (e) removing the exposed areas of the uncured coating; and (f heating the coated substrate of step (e) to a temperature and for a time sufficient to cure the coating. Also disclosed is a process of fabricating a circuit assembly.
Abstract:
A circuit board or each circuit board of a multi-layer circuit board includes an electrically conductive sheet coated with an insulating top layer covering one surface of the conductive sheet, an insulating bottom layer covering another surface of the conductive sheet and an insulating edge layer covering an edge of the conductive sheet. An insulating interlayer can be sandwiched between a pair of adjacent circuit boards of a multi-layer circuit board assembly. A landless through-hole or via can extend through one or more of the circuit boards for connecting electrical conductors on opposing surfaces thereof.
Abstract:
A circuit board layer 2 in accordance with the present invention includes a conductive sheet 4 sandwiched between an insulating top layer 10 and an insulating bottom layer 14. The top and bottom layers 10 and 14 and the conductive sheet 4 define the circuit board layer 2 having an edge that includes an edge 20 of the conductive sheet 4. An insulating edge layer 18 covers substantially all of the edge 20 of the conductive sheet 4.
Abstract:
To produce a green composite laminate 11, a green multilayer collective substrate 13 containing low-temperature sinterable glass ceramic powder as a main ingredient is disposed between first and second shrinkage-restraining layers 14a and 14b containing alumina powder as a main ingredient. Grooves 16 are formed on one main surface 11a of the green composite laminate 11 such as to pass through the first shrinkage-restraining layer 14a and the green multilayer collective substrate 13 and reach the second shrinkage-restraining layer 14b, but not to reach the other main surface 11b of the green composite laminate 11. The green composite laminate 11 provided with the grooves 16 is sintered under conditions where the low-temperature sinterable glass ceramic powder is sintered and the green first and second shrinkage-restraining layers 14a and 14b are removed to prepare a plurality of ceramic multilayer substrates. This manufacturing method offers ceramic multilayer substrates with a high dimensional accuracy and substantially prevents defective divisions when a multilayer collective substrate is split into a plurality of ceramic multilayer substrates.
Abstract:
A printed circuit board (PCB) is provided for use with electrical apparatus. The PCB has a body with a surface provided for the location of electrical components thereon and electrically conductive tracks are provided for electrically connecting the component in a required arrangement. A portion of the PCB body has a test port thereon for allowing testing of functions of the PCB, electrical conductive tracks and/or electrical components. The testing portion of the PCB body provided with the test ports is detachably attached to the PCB body to allow removal therefrom.
Abstract:
A PCB scrap edge removal tool comprising scrap removal jaws formed of two matching opposing pieces of metal having cut-outs in a castellated fashion. The jaws have a gap between them for receiving a PCB work piece to be finished. Metal dowels for PCB positioning span the gap. A PCB is positioned in the gap and rocked back and forth to break off the scrap edge pieces. The cut-outs in the scrap removal jaws correspond to portions of the PCB edge that are not to be removed. These portions move freely in the cut-outs as the PCB is rocked back and forth.
Abstract:
A circuit board layer 2 in accordance with the present invention includes a conductive sheet 4 sandwiched between an insulating top layer 10 and an insulating bottom layer 14. The top and bottom layers 10 and 14 and the conductive sheet 4 define the circuit board layer 2 having an edge that includes an edge 20 of the conductive sheet 4. An insulating edge layer 18 covers substantially all of the edge 20 of the conductive sheet 4.
Abstract:
Electrical circuit trimming methods. In one aspect of the invention, a trimming method includes assembling one or more components of an electrical circuit onto a printed circuit board having one or more electrical connections coupled to the said one or more components. An electrical parameter of the electrical circuit is then trimmed. The trimming of the electrical parameter of the electrical circuit includes removing a portion of the printed circuit board to break the electrical connection on the printed circuit board. In another aspect of the invention, the trimming the electrical parameter of the electrical circuit includes electrical programming of the electrical circuit.