Abstract:
Tamper-respondent electronic circuit structures, electronic assembly packages, and methods of fabrication are provided which include, at least in part, a tamper-respondent sensor. The tamper-respondent sensor includes one or more formed flexible layers of, for instance, a dielectric material, having opposite first and second sides, and circuit lines defining at least one resistive network. The circuit lines are disposed on at least one of the first side or the second side of the formed flexible layer(s). The formed flexible layer(s) with the circuit lines includes curvatures, and the circuit lines overlie, at least in part, the curvatures of the formed flexible layer(s). In certain embodiments, the formed flexible layer(s) may be one or more corrugated layers or one or more flattened, folded layers.
Abstract:
A printed circuit board (100, 200, 300, 400, 500, 600, 700) is described, comprising a layer arrangement composed of a first layer (102, 202, 302, 402, 502, 602, 702) and a second layer (104, 204, 304, 404, 504, 604, 704) connected thereto, an electrically conductive component contact (106, 206, 306, 406, 506, 606, 706) in a surface region of the first layer (102, 202, 302, 402, 502, 602, 702), wherein the component contact (106, 206, 306, 406, 506, 606, 706) can be electrically conductively connected to an electronic component to be mounted on the printed circuit board (100, 200, 300, 400, 500, 600, 700), an electrically conductive structure (108, 208, 308, 408, 509, 609, 709) embedded between the first layer (102, 202, 302, 402, 502, 602, 702) and the second layer (104, 204, 304, 404 , 504, 604 , 704) in the layer arrangement and having a current conducting area that is greater than a component contact area of the component contact (106, 206, 306, 406, 506, 606, 706), and an electrically conductive plated-through hole (110, 210, 310, 410, 510, 610, 710) which penetrates through the first layer (102, 202, 302, 402, 502, 602, 702) and which electrically conductively connects the component contact (106, 206, 306, 406, 506, 606, 706) to the electrically conductive structure (108, 208, 308, 408, 509, 609, 709). An arrangement comprising a printed circuit board and an engine control system comprising a printed circuit board or an arrangement comprising a printed circuit board are furthermore described.
Abstract:
A multilayer circuit board, comprising: a plurality of printed circuit board layers arranged stacked together; and a conductively plated via passing through at least one of the printed circuit board layers in a direction hereinafter referred to as the via direction; wherein a surface of a further one of the printed circuit board layers comprises a conducting region surrounding a non-conducting region; the non-conducting region is substantially centred around a point on the surface of the further printed circuit board layer where the via direction intersects the surface; a back-drilled hole passes through the point on the surface; and a smallest width dimension, that includes the point on the surface, of the non-conducting region (e.g. diameter) is greater than the diameter of the back-drilled hole.
Abstract:
A multilayer circuit board, comprising: a plurality of printed circuit board layers arranged stacked together; and a conductively plated via passing through at least one of the printed circuit board layers in a direction hereinafter referred to as the via direction; wherein a surface of a further one of the printed circuit board layers comprises a conducting region surrounding a non-conducting region; the non-conducting region is substantially centred around a point on the surface of the further printed circuit board layer where the via direction intersects the surface; a back-drilled hole passes through the point on the surface; and a smallest width dimension, that includes the point on the surface, of the non-conducting region (e.g. diameter) is greater than the diameter of the back-drilled hole.
Abstract:
A system and method for energy transfer between a transmitting unit and a receiving unit, the transmitting unit having a transmitting antenna circuit having a first resonant frequency and a high quality factor.