摘要:
A circuit board and a method for fabricating the same are provided. The circuit board comprises: an aluminum-based substrate; an alumina layer formed on at least one surface of the aluminum-based substrate; and a circuit layer formed on the alumina layer. The alumina layer comprises alumina and an element selected from a group consisting of chromium, nickel, a rare earth metal, and a combination thereof.
摘要:
A dielectric layer is directly applied onto the surface of a heat sink part. For example, the composition for making the dielectric layer may be made into a paste or ink and then printed as a paste or ink, or applied with some other equivalent method, such as a lamination technique. The electrical circuit traces are then printed in a similar fashion onto the dielectric layer in the required pattern for whatever circuitry is to be applied. That circuitry (e.g., circuit elements) is then attached to the electrical traces as needed for the particular application.
摘要:
A metal clad circuit board (102) includes a metal substrate (120). A dielectric layer (122) is applied to the metal substrate. A conductive seed layer (124) is printed on the dielectric layer. A conductive circuit layer (126) is plated onto the conductive seed layer. Optionally, the conductive seed layer may be inkjet printed on the dielectric layer. Alternatively, the conductive seed layer may be pad printed on the dielectric layer. Optionally, the dielectric layer may be powder coated to the metal substrate. The dielectric layer may include polymers and fillers compression molded to the metal substrate. Optionally, the conductive circuit layer may be electroplated to the conductive seed layer. Optionally, a solder mask (128) may be applied over the conductive circuit layer.
摘要:
An electronic device comprises a flexible, printed circuit board having an electrically conductive layer (2) on one side of the flexible board, and a conductive metallic stiffener (8) which is attached to the flexible board. Said conductive layer (2) is conductively connected to the metallic stiffener (8) by means of solder. The flexible board is provided with a through-hole (10), the solder connecting the metallic stiffener (8) with the conductive layer (2) being present in said through-hole (10).
摘要:
A method of manufacturing an aluminum substrate for printed circuits, comprises an oxide layer forming step and a heat-drying step. At the oxide layer forming step, an anodic oxide layer is formed on at least one surface of an aluminum plate by anodizing the aluminum plate in an electrolytic solution of phosphoric acid concentration: 3 to 20 mass% and bath temperature: not less than 25 ° C but less than 40 ° C. At the heat-drying step, the anodic oxide layer is dried by heating it at 150 to 300 ° C for 0.5 hour or more. According to this method, a proper oxide layer can be formed, resulting in an aluminum substrate for printed circuits capable of enhancing adhesiveness to a resin plate.