摘要:
Disclosed are systems, devices and methods related to paint delivery and recirculation during manufacture of radio-frequency modules. A closed recirculation system can include a reservoir for holding a volume of metallic paint, a spray apparatus for spraying metallic paint received from the reservoir, and a recirculator for recirculating the un-sprayed metallic paint back to the reservoir. In some embodiments, the recirculator can include a peristaltic pump that allows use of shorter fluid paths and provide a desired level of agitation to quickly achieve and maintain an acceptable level of metal particle suspension. In some embodiments, the spray apparatus can be implemented to have reduced dimensions, and include a mechanism for switching between a spray mode and a recirculate mode. Such a spray apparatus can reduce the amount of paint being utilized, and also reduce accumulation of metal particles therein.
摘要:
In the method according to the invention, the discrete electric component to be cooled is connected to the cooling element without a circuit board or substrate. In the method, a layer of insulating material is thermally sprayed (402) on one surface of the cooling element. The connection points and conductors required by the discrete electric component are formed (403) on top of this insulating layer. The discrete electric component is glued (404) onto the insulating layer. Subsequently, the electrical connections for the discrete component are made. After the discrete component has been electrically connected (405), it can still be protected (406) using a layer of thermally sprayed insulating material.
摘要:
The invention relates to a method for coating both sides of substrates, especially printed circuit boards. One side of a substrate provided with bores is coated using a coating technique, especially screen-printing, in such a way that those bores that are not required for establishing the connections are permanently covered and those that are required are only slightly covered or left uncovered. The other side of the substrate is coated using a coating technique, especially curtain coating or spraying, in such a way that the entire surface of the substrate is provided with an even layer, resulting in a light coating of the bores.
摘要:
Composition, apparatus and process for directing a narrow spray (84) of a rapid drying polymer solution to form in situ a web fabric structure (50, 150) to hold closely spaced discrete electrical components and integrated circuits (30) in place on a printed circuit board (40) with the external leads of connectors of such units (71-76) projecting through holes in such circuit board so that such units are held to the circuit board during soldering of those leads to the conductive portions of the printed circuit board and other manipulations. The fabric structure is of a chemical composition that may be readily completely removed, such as by solvent action, from the circuit board and from the units after need for such fabric has passed. A solder masking agent, also disclosed, can be removed at the same time the web fabric structure is removed. A useful fabric forming spray solution is acrylic resin in an alcohol solution.
摘要:
Methods for applying protective coatings to electronic devices that have already been assembled, and are in a consumer-ready or aftermarket form, are disclosed. In such a method, an electronic device may be at least partially disassembled to expose at least a portion of an interior of the electronic device. A protective coating is applied to some or all of the exposed surfaces of the electronic devices, including one or more internal surfaces, features or components of the electronic device. Thereafter, the electronic device may be reassembled. During and after reassembly, the protective coating resides internally within the electronic device. Systems for applying protective coatings to interior components of previously assembled electronic devices are also disclosed.
摘要:
A silicone protective coating for an electronic light source and a method for applying the coating over an exposed or outer surface of the electronic light source assembled as part of or mounted to a circuit board or other substrate.