Asymmetric digital watch module
First Claim
1. An electronic watch module having a thin profile, said module comprising:
- a printed circuit board having a generally flat circular configuration defining a face and a back,electronic watch components including display means mounted on said face of said board, anda cover permanently secured to said face and defining walls spaced from and hermetically sealing said electric watch components on the face of said board, said cover having separate hermetically sealed compartments including a transparent portion covering said display means and an opaque portion covering other components on said face, the thickness of said module being defined substantially by the sum of the thickness of said board and the thickness of said cover.
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Accused Products
Abstract
An electronic watch module includes a circuit board having all the electronic watch components including a plurality of LED'"'"'s and a CMOS integrated circuit device mounted on one side thereof defined as the face of the board. The board is of a generally flat circular configuration and having generally rectangular cutouts at the upper side thereof for mounting a crystal oscillator and a pair of arcuate slots or cutouts along the edge thereof for mounting a pair of elastomeric switch contact members. A cover for the board includes a transparent portion defining a transparent portion sealingly enclosing the LED'"'"'s and an opaque portion defining an opaque compartment for sealingly enclosing the CMOS integrated circuit device. The cover is hermetically sealed to the board for sealing these components. The overall layout of the circuit on the board is related to guide flats to facilitate automatic testing.
The method disclosed includes the mounting of the electronic components of the watch including a plurality of LED'"'"'s and a CMOS integrated circuit on the face of a selected printed circuit board by first screening an epoxy on selected areas of the surface of the circuit board and mounting the electronic components on the selected areas, curing the epoxy in a nitrogen purged oven, and thereafter hermetically sealing the electronic components of the watch module by means of a cover including a transparent portion sealingly enclosing the LED'"'"'s and an opaque portion sealingly enclosing the CMOS integrated circuit, the cover being mounted by the step of screening epoxy on the underside thereof placing the cover on the printed circuit board clipping the board and cover together and placing in an oven purged by nitrogen and heating for a period of time sufficient to cure the epoxy.
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Citations
22 Claims
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1. An electronic watch module having a thin profile, said module comprising:
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a printed circuit board having a generally flat circular configuration defining a face and a back, electronic watch components including display means mounted on said face of said board, and a cover permanently secured to said face and defining walls spaced from and hermetically sealing said electric watch components on the face of said board, said cover having separate hermetically sealed compartments including a transparent portion covering said display means and an opaque portion covering other components on said face, the thickness of said module being defined substantially by the sum of the thickness of said board and the thickness of said cover. - View Dependent Claims (3, 4, 6, 7, 8, 9, 10, 11, 12, 13, 15)
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2. An electronic watch module of a thin profile, said module comprising:
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a printed circuit board having a thin generally flat circular configuration defining a face and a back, and having alignment guide means associated therewith. electronic watch components including display means mounted on said face of said board, a plurality of probe pads located on the back of said board in predetermined positions with respect to said guide means and each pad connected to one of said electronic watch components and thereby adapted for automatic external testing of said electronic watch components, and a cover defining wall means spaced from and hermetically sealing said face of said board, said cover having a transparent portion covering said display means in spaced relation thereto and an opaque portion covering other electronic watch components on said face in spaced relation thereto, the thickness of said module consisting substantially of the thickness of said cover and the thickness of said printed circuit board. - View Dependent Claims (5, 14, 16, 17, 18, 19, 20, 21, 22)
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Specification