Abstract:
A method for applying a protective coating to selected portions of a substrate is disclosed. The method includes applying a mask to or forming a mask on at least one portion of the substrate that is not to be covered with the protective coating. The mask may be selectively formed by applying a flowable material to the substrate. Alternatively, the mask may be formed from a preformed film. With the mask in place, the protective coating may be applied to the substrate and the mask. A portion of the protective coating that overlies the mask may be delineated from other portions of the protective coating; for example, by cutting, weakening or removing material from the protective coating at locations at or adjacent to the perimeter of the mask. The portion of the protective coating that overlies the mask, and the mask, may then be removed from the substrate.
Abstract:
A coating system with an applicator that has an air cylinder with a needle valve. A control has a timer that provides a string of electrical pulses to a solenoid. With each pulse, the solenoid applies pressurized air to a cylinder piston, thereby opening the needle valve and permitting coating material to flow past the needle valve. The needle valve is closed for durations of time between pulses, and the coating material is ejected from a dispensing needle in response to closings of the needle valve.
Abstract:
An implantable medical device including a plurality of components on a substrate, and a biocompatible multi-layer coating applied by vapor deposition to conform to and sealingly cover at least a portion of the components and/or the substrate. The coating is applied in at least two sets, each set having first, second and third layers. At least one of the first, second and third layers consist essentially of a polymer such as parylene and at least one of the other two layers of the set consist essentially of inorganic material such that each layer differs in at least one diffusion barrier property from the other layers in the set and adds to an overall barrier effect of the coating.
Abstract:
An electrical assembly which comprises a substrate and a conformal coating deposited on at least one surface of the substrate by plasma polymerization of a compound of formula (I) and deposition of a resulting polymer of the compound of formula (I), and plasma polymerization of a fluorohydrocarbon and deposition of a resulting polymer of the fluorohydrocarbon, such that the resulting polymer of the compound of formula (I) and the resulting polymer of the fluorohydrocarbon create discrete layers of the conformal coating; wherein the compound of formula (I) is an organic compound.
Abstract:
An electrical device comprising an electronic component mounted to a surface of a printed circuit board, a ground connection on said surface, and electromagnetic interference (EMI) shielding. The EMI shielding includes an electrical insulator coating the electronic component, the insulator contacting the surface, and a conductive layer covering the electrical insulator, and contacting the electrical insulator and the ground connection.
Abstract:
A thermally conductive polymer composition is applied to mounted components to provide both thermal control and RF radiation attenuation. In order to improve the RF attenuation performance, a plurality of discrete conductive elements may be incorporated into the polymer composition, with the sizing, spacing and configuration of the suppressed most efficiently by the particular composition. The discrete conductive elements are significantly larger, on the order of 1-5 mils (approximately 25-127 μm) than the filler materials utilized to render the base polymer conductive. Also disclosed is an apparatus and a method for preparing and applying such a polymer composition to an electronic component.
Abstract:
A system and method of forming a patterned conformal structure for an electrical system is disclosed. The conformal structure includes a dielectric coating shaped to conform to a surface of an electrical system, with the dielectric coating having a plurality of openings therein positioned over contact pads on the surface of the electrical system. The conformal structure also includes a patterned conductive coating layered on the dielectric coating and on the contact pads such that an electrical connection is formed between the patterned conductive coating and the contact pads. The patterned conductive coating comprises at least one of an interconnect system, a shielding structure, and a thermal path.
Abstract:
A waterproof method for an electronic device and a waterproof electronic device are provided. The electronic device comprises a printed circuit board, which comprises a board, a plurality of electrical elements and a button device. The waterproof method comprises the following steps: applying a first non-solid adhesive to cover the button device directly, curing the first non-solid adhesive to form a first waterproof layer, applying a second non-solid adhesive to at least cover the electrical elements directly and curing the second non-solid adhesive to form a second waterproof layer. In the end, assembling the printed circuit board, sealed with the waterproof layers, into a case to form the waterproof electronic device.
Abstract:
An electrical device is provided. The electrical device comprises a circuit board and a waterproof layer. The waterproof layer substantially seals at least one portion of the circuit board to prevent the short circuit after water infiltrating. Thereby, this particular structure provides superior waterproof protection for the electrical device. This electrical device may be installed in a band structure which facilitates portability. Moreover, the present invention further provides methods for sealing at least one portion of the electrical device or the circuit board hermetically, while the electrical device or the circuit board would be sealed with the waterproof layer hermetically.
Abstract:
For shielding of flat modules having high-frequency components in information technology equipment, a surface of the shielding extends only over a region of the components to be shielded. The shielding surface is connected in an electrically conductive manner with a contact surface on the circuit board that surrounds the components.