# US 5,710,693 A · Electronic device having a flat, card-like casing enclosing components for a complete computer system including a sub-printed wiring board attached to an inner surface of the casing and electrically connected to a printed wiring board by a flexible member

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- Number: US 5,710,693 A
- Document ID: US5710693A
- Status: Granted
- Kind: A
- Application number: 08/439,880
- Filed: 1995-05-12
- Granted: 1998-01-20
- Earliest claimed: 1992-11-13
- Assignees: Seiko Epson Corporation
- Inventors: Katsumi Tsukada; Norio Nakamura; Minoru Nimura; Hiroyuki Suemori; Tomio Kamihata; Mutsuaki Yamazaki
- Web page: https://patentgrep.com/patent/US5710693A

## CPC

- G06F 1/1656: {Details related to functional adaptations of the enclosure, e.g. to provide protection against EMI, shock, water, or to host detachable peripherals like a mouse or removable expansions units like PCMCIA cards, or to provide access to internal components for maintenance or to removable storage supports like CDs or DVDs, or to mechanically mount accessories (mounting of accessories to a computer display G06F1/1607; display hoods G06F1/1603; cooling arrangements for portable computers G06F1/203)}
- G06F 1/16: Constructional details or arrangements
- G06F 1/1626: {with a single-body enclosure integrating a flat display, e.g. Personal Digital Assistants [PDAs]}
- G06F 1/18: Packaging or power distribution
- H05K 1/141: {One or more single auxiliary printed circuits mounted on a main printed circuit, e.g. modules, adapters (H05K1/142 and H05K1/147 take precedence)}
- H05K 1/148: {Arrangements of two or more hingeably connected rigid printed circuit boards, i.e. connected by flexible means}
- H05K 5/0269: {Card housings therefor, e.g. covers, frames, PCB}
- G06F 2200/1631: Panel PC, e.g. single housing hosting PC and display panel
- H05K 1/181: associated with surface mounted components
- H05K 3/36: Assembling printed circuits with other printed circuits {(H05K7/142 takes precedence)}
- H05K 3/361: {Assembling flexible printed circuits with other printed circuits}
- H05K 2201/045: Hierarchy auxiliary PCB, i.e. more than two levels of hierarchy for daughter PCBs are important
- H05K 2201/10159: Memory
- H05K 2201/10689: Leaded Integrated Circuit [IC] package, e.g. dual-in-line [DIL]
- H10W 72/5522: {comprising gold [Au]}
- H10W 72/884: {Die-attach connectors and bond wires}
- H10W 74/00: Encapsulations, e.g. protective coatings
- H10W 90/754: {between a chip and a stacked insulating package substrate, interposer or RDL}
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10

## Abstract

A thin and small computer system that can be used generally for control of equipment or the like, includes a CPU chip, peripheral control chips, and other components mounted in the form of a bare chip, whereby a computer system having a so-called hierarchy architecture can be incorporated in an IC card-like casing. Computer system components are affixedly attached to a double-sided printed wiring board. Electronic components may be attached to the printed wiring board in a bare form and then at least partially sealed with a resin. A system may further include a second printed board which is independent from the first printed board and adhesively attached to a inner surface of the casing and connected to the first printed board by a flexible member. In addition the second circuit board may include structure which enables it to connect to an apparatus for programming an electronic component attached thereto.

## Claims

### Claim 1

An electronic device comprising:
a flat, card-like casing encasing computer system component elements including a CPU, memories, and peripheral equipment control ICs electrically coupled to each other; said flat, card-like casing also encasing a printed wiring board, at least one of said system component elements attached to said printed wiring board in a bare form that said at least one system component element assumes before being partially sealed within a package, said at least one system component element being sealed with a resin after being attached to said printed wiring board, and wherein at least one of said system component elements is attached to a sub-printed wiring board that is independent of said printed wiring board, said sub-printed wiring board and said printed wiring board being electrically coupled with each other using a flexible member, and said sub-printed wiring board being attached to an inner surface of the casing using an adhesive.

### Claim 2 (depends on 1)

An electronic device according to claim 1, wherein said at least one system component element that is sealed with said resin after being mounted on said sub-printed wiring board is a memory that stores procedures to be executed by said CPU.