摘要:
In a printed circuit board, PCB (10, 30), a number of blind holes (16, 42, 44) are provided for soldering an end of a lead (20) of a component without the end of the lead extending through the PCB. Thus, a substantially flat surface is obtained. The substantially flat surface allows for good thermal contact with a heatsink and/or for miniaturization purposes. In order to allow use of common manufacturing methods the PCB according to the present invention comprises a first layer (12) and a second layer (14) arranged at a first surface (12A) of the first layer. An electrically conductive trace (18) is arranged on the first layer. The hole is arranged in the first layer, wherein the hole extends from the electrically conductive trace through the first layer, the hole being closed at the first surface of the first layer by the second layer. The hole is configured for accommodating an end of the lead and electrically connecting the lead and the trace.
摘要:
A method of creating an active electrode that may include providing a flex circuit having an electrode made of a first material and providing a first mask over the flex circuit, the first mask having an offset region and an opening that exposes the electrode. The method may also include depositing a second material over the offset region and the opening, the second material being different from the first material an providing a second mask over the second material, the second mask having a opening over a portion of the second material that is over the offset region.
摘要:
The present invention relates to a compact substrate and a method for making the same. The compact substrate comprises at least one or a combination of a coreless structure, a double via structure and a compact double sided laser drilled (DSLD) via structure. The coreless structure has a first circuit comprising a plurality of first metal pads (151) and first metal lines (152). A first solder resist layer (16) is formed to cover parts of the first circuit and expose parts of the first metal pads (151) and parts of the first metal lines (152). Some Photo-Imageable Dielectric (PID) material can also be used to form the first solder resist layer (16). A second circuit comprising second metal pads (181) and second metal lines (182) are formed on the first solder resist layer (16). The second metal pads (181) cover the exposed first metal pads (151) and exposed first metal lines (152). The double via structure comprises a core substrate (19) having a first surface (191) and a second surface (192). Blind via holes (201) are formed on the first surface (191) of the core substrate (19). At least one through via holes (202) are formed on the base of the blind Via holes. The through via holes (202) are smaller in diameter as compared to that of the blind via holes (201). The through via holes (202) are located within the base of the blind via holes (201): The combination of the blind via holes (201) and the through via holes (202) forms the double via holes that penetrate through the core substrate (19). A compact double sided laser drilled (DSLD) via structure comprises a core substrate (19) having a first surface (191) and a second surface (192). DSLD via holes are formed and penetrate through the core substrate (19). Having the shape of two cones combined heads on, the DSLD via hole has its largest opening at its both ends and has its smallest opening somewhere near its middle portion.
摘要:
L'invention concerne un procédé de fabrication d'un composant ou d'un module regroupant dans un boîtier prêt à monter sur circuit imprimé un ensemble de composants montés sur un substrat comprenant au moins une étape d'enrobage à l'aide d'un matériau isolant d'au moins une partie dudit module et au moins une étape de réalisation, sur une partie dudit matériau isolant, d'au moins une zone conductrice, de façon à définir des zones formant et/ou pouvant recevoir au moins une partie d'un composant et/ou au moins un élément d'interconnexion.