Wyeman Chen
Wyeman Chen, Hayward, CA US
Patent application number | Description | Published |
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20100224401 | METHODS AND APPARATUS FOR SHIELDING CIRCUITRY FROM INTERFERENCE - This is directed to methods and apparatus for shielding a circuitry region of an electronic device from interference (e.g., EMI). A conductive dam may be formed about a periphery of the circuitry region. A non-conductive or electrically insulating fill may then be applied to the circuitry region within the dam. Next, a conductive cover may be applied above the fill. The cover may be electrically coupled to the dam. The dam may include two or more layers of conductive material stacked on top of one another. In some embodiments, the conductive cover may be pad printed or screen printed above the fill. In other embodiments, the conductive cover may be a conductive tablet that is melted above the fill. | 09-09-2010 |
20110255250 | PRINTED CIRCUIT BOARD COMPONENTS FOR ELECTRONIC DEVICES - Electronic devices may be provided that include mechanical and electronic components. Connectors may be used to interconnect printed circuits and devices mounted to printed circuits. Printed circuits may include rigid printed circuit boards and flexible printed circuit boards. Cosmetic structures such as cowlings may be used to improve device aesthetics. Bumpers may be mounted over rough edges of printed circuit boards to protect flex circuits that are routed over the printed circuit boards. Fasteners may be soldered to solder pad structures on printed circuit boards. | 10-20-2011 |
20120023743 | METHODS AND APPARATUS FOR SHIELDING CIRCUITRY FROM INTERFERENCE - This is directed to methods and apparatus for shielding a circuitry region of an electronic device from interference (e.g., EMI). A conductive dam may be formed about a periphery of the circuitry region. A non-conductive or electrically insulating fill may then be applied to the circuitry region within the dam. Next, a conductive cover may be applied above the fill. The cover may be electrically coupled to the dam. The dam may include two or more layers of conductive material stacked on top of one another. In some embodiments, the conductive cover may be pad printed or screen printed above the fill. In other embodiments, the conductive cover may be a conductive tablet that is melted above the fill. | 02-02-2012 |
20120024588 | METHODS AND APPARATUS FOR SHIELDING CIRCUITRY FROM INTERFERENCE - This is directed to methods and apparatus for shielding a circuitry region of an electronic device from interference (e.g., EMI). A conductive dam may be formed about a periphery of the circuitry region. A non-conductive or electrically insulating fill may then be applied to the circuitry region within the dam. Next, a conductive cover may be applied above the fill. The cover may be electrically coupled to the dam. The dam may include two or more layers of conductive material stacked on top of one another. In some embodiments, the conductive cover may be pad printed or screen printed above the fill. In other embodiments, the conductive cover may be a conductive tablet that is melted above the fill. | 02-02-2012 |
Wyeman Chen, Fremont, CA US
Patent application number | Description | Published |
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20130122725 | Printed Circuits with Staggered Contact Pads and Compact Component Mounting Arrangements - Electronic devices may be provided with printed circuits to which integrated circuits and other electrical components may be mounted. A first printed circuit may have a first surface with an array of contact pads arranged in rows and columns. Each column of contact pads may have a series of contact pads separated by gaps. The contact pads in each column may be staggered with respect to the contact pads in adjacent columns such that each contact pad in a given column is horizontally adjacent to associated gaps in the adjacent columns. A component may be mounted to an opposing surface of the printed circuit such that it overlaps one of the gaps between the staggered contact pads. By mounting the component to portions of the first printed circuit that do not overlap the staggered contact pads, the risk of damaging the electrical component during solder reflow operations may be minimized. | 05-16-2013 |
20130125392 | Mounting of Components Using Solder Paste Fiducials - A printed circuit board may have patterned traces. Components may be mounted to the printed circuit board using solder. Solder paste may be printed onto the printed circuit board using a stencil. Following reflow operations, the solder paste may form solder bumps that connect component leads to traces on the printed circuit board. Misalignment between the mounted components and printed circuit board traces can be minimized by forming fiducials from solder paste. During the process of printing solder paste patterns on the printed circuit board, solder paste printing equipment may form the solder paste fiducials. Component mounting equipment may use cameras or other imaging equipment to gather information on the location of the solder paste fiducials. The component mounting equipment may then mount the components on the printed circuit using the information on the location of the solder paste fiducials. | 05-23-2013 |
20140085850 | Printed circuit board with compact groups of devices - Electronic devices may contain electrical systems in which electrical components are mounted on a substrate such as a printed circuit board. The electrical components may include surface mount technology components. Multiple surface mount technology components may be stacked on top of each other and beside each other to form an electrical component that minimizes the amount of area that is consumed on a printed circuit board. Noise suppression circuits and other circuits may be implemented using stacked surface mount technology components. Surface mount technology components placed on the printed circuit board may be pushed together and subsequently injection molded to form packed component groups. An integrated circuit may be mounted to the printed circuit board via an interposer and may cover components mounted to the printed circuit board. An integrated circuit may be mounted over a recessed portion of the printed circuit board on which components are mounted. | 03-27-2014 |
Wyeman Chen, Heyward, CA US
Patent application number | Description | Published |
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20130120957 | RF SHIELDING FOR ELECTRONIC COMPONENTS - An RF shield formed of RF opaque material that permits access to components on a printed circuit board is described. The RF shield can include a first portion attached to the PCB and a removable top portion attached to the first portion at an interface. The top portion is removed from the first portion to expose the components on the PCB. In one aspect of the described embodiment, the top portion is peeled away from the first portion. The components are enclosed within the RF shield after the removal of the top portion by attaching and sealing another top portion to the first portion at the interface by, for example, laser attaching the first portion and the other top portion at the interface. | 05-16-2013 |