| 摘要 |
An anisotropically electroconductive adhesive comprising a thermosetting insulating adhesive mixed with electroconductive particles, the thermosetting insulating adhesive having an intrinsic acoustic impedance of about 1.4 MPa.s/m or less is provided. Piezoelectric resonators are bonded to lands on an insulating substrate using this anisotropically electroconductive adhesive. The piezoelectric resonators are connected in a ladder type to form a ladder filter by pattern electrodes on the insulating substrate. When a filter is prepared using piezoelectric resonators, this anisotropically electroconductive adhesive can provide good filter characteristics without propagating the vibration of the piezoelectric resonators to the insulating substrate.
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