Molded memory card with write protection switch assembly
First Claim
1. A memory card device comprising:
- a printed circuit board assembly (PCBA) including;
a printed circuit board (PCB) having opposing first and second surfaces, the printed circuit board (PCB) including,a plurality of metal contacts mounted on the first surface of the PCB and connected to corresponding conductive traces,at least one passive component surface mounted on a selected one of the first and second surfaces of the PCB,at least one integrated circuit (IC) device mounted on said selected one of the first and second surfaces of the PCB;
an integral molded plastic casing comprising thermoset plastic and including an upper wall formed on the first surface, a lower wall formed on the second surface, and opposing first and second walls extending between the upper and lower walls,wherein the molded plastic casing is formed such that said at least one passive component and said at least one IC device are encased by said thermoset plastic, andwherein the molded plastic casing includes a pre-molded switch slot includes a cavity that is exposed by a first opening defined between first and second portions of said second side wall and a second opening defined in a portion of the lower wall; and
a write protect switch assembly mounted onto the molded plastic casing, the write protect switch assembly including;
a movable switch button having a base portion movably engaged in the cavity of the pre-molded switch slot, and a button top extending through the first opening; and
a switch cap secured to the lower wall of the molded plastic casing and having a flat wall portion of the switch cap encloses the second opening such that the base portion of the movable switch button is covered by the flat wall portion.
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Accused Products
Abstract
A Secure Digital device including a PCBA having passive components mounted on a PCB using surface mount technology (SMT) techniques, and active components (e.g., controller and flash memory) mounted using chip-on-board (COB) techniques. The components are mounted only on one side of the PCB, and then a molded plastic casing is formed over both sides of the PCB such that the components are encased in the plastic, and a thin plastic layer is formed over the PCB surface opposite to the components. The molded plastic casing is formed to include openings that expose metal contacts provided on the PCB, and ribs that separate the openings. The molded plastic casing defines a pre-molded switch slot that facilitates an insert-in switch assembly process for mounting a write protect switch. The write protect switch includes a movable switch button engaged in the switch slot, and a switch cap secured over the switch slot.
123 Citations
21 Claims
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1. A memory card device comprising:
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a printed circuit board assembly (PCBA) including; a printed circuit board (PCB) having opposing first and second surfaces, the printed circuit board (PCB) including, a plurality of metal contacts mounted on the first surface of the PCB and connected to corresponding conductive traces, at least one passive component surface mounted on a selected one of the first and second surfaces of the PCB, at least one integrated circuit (IC) device mounted on said selected one of the first and second surfaces of the PCB; an integral molded plastic casing comprising thermoset plastic and including an upper wall formed on the first surface, a lower wall formed on the second surface, and opposing first and second walls extending between the upper and lower walls, wherein the molded plastic casing is formed such that said at least one passive component and said at least one IC device are encased by said thermoset plastic, and wherein the molded plastic casing includes a pre-molded switch slot includes a cavity that is exposed by a first opening defined between first and second portions of said second side wall and a second opening defined in a portion of the lower wall; and
a write protect switch assembly mounted onto the molded plastic casing, the write protect switch assembly including;a movable switch button having a base portion movably engaged in the cavity of the pre-molded switch slot, and a button top extending through the first opening; and a switch cap secured to the lower wall of the molded plastic casing and having a flat wall portion of the switch cap encloses the second opening such that the base portion of the movable switch button is covered by the flat wall portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for producing a plurality of memory card devices, the method comprising:
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producing a printed circuit board (PCB) panel including a plurality of PCB regions, each PCB region including a plurality of metal contacts disposed on an upper surface of said each PCB region; attaching at least one passive component and at least one integrated circuit (IC) device to one of said upper surface and an opposing lower surface of each said PCB region; mounting the PCB panel into a molding apparatus such that said upper surface of each said PCB region is disposed over a lower molding die and said metal contacts are pressed against raised supports; forming a molded casing over at least one of the first surface and the second surface of each PCB region such that said at least one passive component and said at least one IC device of each PCB region are covered by thermal set plastic forming upper and lower walls of said molded casing, and such that the molded casing includes a pre-molded switch slot includes a cavity that is exposed by a first opening defined between first and second portions of a side wall of said molded casing, and a second opening defined in a portion of the lower wall; singulating said PCB panel by cutting said PCB panel such that the PCB panel is separated into said plurality of memory card devices, wherein each memory card device includes a PCB region and a corresponding said molded casing; and mounting a write protect switch assembly onto the integral molded plastic casing, such that a movable switch button of the write protect switch assembly is mounted with a base portion movably engaged in the cavity of the pre-molded switch slot and a button top extending through the first opening, and a switch cap is secured to the lower wall of molded casing and has a flat wall portion of the switch cap enclosing the second opening such that the base portion of the movable switch button is covered by the flat wall portion.
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Specification