Surface acoustic wave device sealing method

• US 4,699,682 A
• Filed: 10/16/1986
• Issued: 10/13/1987
• Est. Priority Date: 10/23/1985
• Status: Expired due to Fees

• Current Assignee: Clarion Co., Ltd. (Faurecia SA)
• Original Assignee: Clarion Co., Ltd. (Faurecia SA)
• Inventors: Takishima, Shoji
• Primary Examiner(s): Weston, Caleb
• Application Number:
  US06/919,904
• Time in Patent Office: 362 Days
• Field of Search: 156/242, 156/290, 156/292, 29/594, 310/311, 310/313 R, 310/313 B, 310/313 C, 310/322, 310/325, 310/334, 310/340, 310/363, 310/364, 310/367, 310/368, 310/369, 310/370, 333/150, 333/154
• US Class Current: 156/292
• CPC Class Codes: B29C 70/72 Encapsulating inserts having non-encapsulated projections, e.g. extremities or terminal portions of electrical components B29C70/742 takes precedence
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48247 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 2224/73265 Layer and wire connectors
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H03H 9/1085 the enclosure being defined by a non-uniform sealing mass covering the non-active sides of the BAW device
• CPC Class Codes: H03H 9/1092 the enclosure being defined by a cover cap mounted on an element forming part of the surface acoustic wave [SAW] device on the side of the IDT's
• CPC Class Codes: H05K 5/0095 hermetically-sealed
• CPC Class Codes: Y10T 29/49005 Acoustic transducer

Abstract

A surface acoustic wave device sealing method prepares a cavity-defining member and lead members for electrical connection. A surface acoustic wave element having a wave propagation surface and electrodes is bonded to the cavity member by an adhesive applied to the circumferential edge of the cavity so that the propagation surface is opposed to the interior of the cavity, and the electrodes are exposed to the exterior of the cavity member. The electrodes are connected to the lead members, and the resulting unitary body is sealed by a mass of resin.

Claims

1. A surface acoustic wave device sealing method comprising:

preparing a cavity member defining a widely opening cavity and originally disposed so that said cavity opens upward;

bonding a surface acoustic wave element on the open end of said cavity member, said element having a wave propagation surface opposed to the interior of said cavity of the cavity member and electrodes exposed to the exterior of said cavity;

connecting said electrodes of the surface acoustic wave element to lead members disposed around said cavity member; and

sealing the substantially entire structure including said element and juctions to the lead members by a mass of resin.