摘要:
PROBLEM TO BE SOLVED: To provide an electromagnetic wave absorbing material having a high electromagnetic wave absorption characteristic.SOLUTION: Provided is an electromagnetic wave absorbing material, including a base material and a porous carbon material containing, as a raw material, a plant-based material having a silicon (Si) content of 5% by mass or more, in which the porous carbon material has a specific surface area value measured by the nitrogen BET method of 400 m/g or more, a silicon (Si) content of 1% by mass or less, a pore volume measured by the BJH method of 0.2 cm/g or more, and a pore volume measured by the MP method of 0.2 cm/g or more.
摘要:
PROBLEM TO BE SOLVED: To provide an integrated circuit built-in device capable of preventing electromagnetic waves which have a harmful effect on the outside of the device from leaking to the outside of the device while preventing an increase in device weight.SOLUTION: The integrated circuit built-in device (display device) comprises: a first wiring board 3 on which a first control device M1 (microcomputer) is mounted; and a second wiring board 11 which faces the first wiring board 3 and on which a second control device M2 (graphic controller) is mounted. The first control device M1 and the second control device M2 which emit electromagnetic waves to the outside of the device are located between the first wiring board 3 and the second wiring board 11. The first wiring board 3 has a first electromagnetic shielding part S1, and the second wiring board 11 has a second electromagnetic shielding part S2. When seen from a normal direction of an opposite side of the wiring board, the first electromagnetic shielding part S1 and the second electromagnetic shielding part S2 are overlapped, and the first control device M1 and the second control device M2 are located in the overlapped area.
摘要:
PROBLEM TO BE SOLVED: To provide a signal line capable of easily being bent and reducing unwanted radiation, and a circuit board.SOLUTION: A signal line 32 is a linear conductor provided in a laminated body 12. A ground conductor 30 is provided at a positive direction side in a z-axis direction rather than a signal line 32 inside the laminated body 12 and overlapped with the signal line 32 in a plane view from the z-axis direction. A ground conductor 34 is provided at a negative direction side in the z-axis direction rather than the signal line 32 inside the laminated body 12 and overlapped with the signal line 32 in the plane view from the z-axis direction. Via hole conductors B1 to B36 connect to ground conductors 30, 34. A plurality of opening parts o1 to o8 are provided in the ground conductor 30 so as to be arranged along the signal line 32 in the plane view from the z-axis direction. Via hole conductors B1 to B36 are provided between adjacent opening parts O1 to O8 in an x-axis direction.