Electromagnetic wave shielding sheet
AssigneeTaiyo Yuden Co., Ltd.
InventorsHiroshi Tsutagaya, Takashi Ishiguro
Life of this patent
Estimating the term…
Abstract
An electromagnetic wave shielding sheet having a high shielding effect for electromagnetic waves and capable of suppressing secondary emission causing noises without using GND connection, in which the electromagnetic shielding sheet includes a laminate film on a paper substrate, the laminate film has a laminate structure where an adhesive layer having adhesion property, a resistor layer and an insulator are laminated, the resistivity of the insulator is set to about 106 Ω/cm or higher and the resistance value of the resistor layer is set to about 10Ω to 300Ω, so that secondary emission can be decreased while keeping a high shielding effect.
Claims12
An electromagnetic wave shielding sheet comprising a resistor layer and an adhesive layer adhering to one main surface of the resistor layer, wherein the resistance value of the resistor layer is within a range from about 10Ω to 300Ω when measured for a distance of 98 mm at the center of the width for 100 mm length and 2 mm width.
A method of making an electromagnetic wave shielding sheet, the method comprising:
- forming a resistor layer on an insulator layer by vapor deposition, wherein the resistance value of the resistor layer is within a range from about 10Ω to 300Ω when measured for a distance of 98 mm at the center of the width for 100 mm length and 2 mm width;
- and
- bonding an adhesive layer to the resistor layer by dry lamination.
An electromagnetic wave shielding sheet comprising a resistor layer and an adhesive layer adhering to one main surface of the resistor layer, wherein the resistor layer has a sheet resistance of about 0.2 to about 6.1 ohms.
Dependencies are inferred from the claim text.