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US 12,009,805 B2Granted
DMS filter, electroacoustic filter and multiplexer
AssigneeRF360 Singapore Pte. Ltd.
InventorsThomas Bauer, Ansgar Schäufele, Thomas Dengler
Life of this patent
Estimating the term…
Abstract
An improved DMS filter with electrode structures between a first port and a second port is provided. Wiring junctions are realized in multilayer crossing with dielectric material in between. There are insulating patches (L2) between crossing conductor layers (L1,L3). Signal wirings may be realized with multiple conductor layers (L1, L3) to reduce wiring resistance and the upper conductor layer (L3) of the signal wiring may partly overlap the insulating patches (L2). The insulating patches (L2) may extend over the acoustic path to achieve temperature compensation.
Claims23
A DMS filter, comprising:
- a first port and a second port;
- a piezoelectric material;
- and
- an electrode structure arranged above or on the piezoelectric material and electrically connected between the first port and the second port, wherein:
- the electrode structure has a multi layer construction,
- the multi layer construction comprises metal and dielectric material, the electrode structure comprising:
- a first reflector and a second reflector;
- first IDTs and second IDTs, wherein the first IDTs and the second IDTs are arranged between the first and the second reflectors;
- and
- a first inter IDT connection and a second inter IDT connection, wherein:
- each of the first IDTs and each of the second IDTs have a first busbar and a first connection and a second busbar and a second connection,
- the first busbar and the first connection of each of the first IDTs are electrically connected via the first inter IDT connection,
- the second busbar and the second connection of each of the second IDTs are electrically connected via the second inter IDT connection, and
- wherein the first inter IDT connection and the second inter IDT connection each comprise a lower metal strip and an upper metal strip.
11 more elements
A DMS filter, comprising:
- a first port and a second port;
- a piezoelectric material;
- and
- an electrode structure arranged above or on the piezoelectric material and electrically connected between the first port and the second port, wherein:
- the electrode structure has a multi layer construction,
- the multi layer construction comprises metal and dielectric material, the electrode structure comprising:
- a first reflector and a second reflector;
- first IDTs and second IDTs, wherein the first IDTs and the second IDTs are arranged between the first and the second reflectors;
- and
- a first inter IDT connection and a second inter IDT connection, wherein:
- each of the first IDTs and each of the second IDTs have a first busbar and a first connection and a second busbar and a second connection,
- the first busbar and the first connection of each of the first IDTs are electrically connected via the first inter IDT connection,
- the second busbar and the second connection of each of the second IDTs are electrically connected via the second inter IDT connection, and
- wherein the dielectric material of the multi layer construction comprises insulating patches that overlap the first connection of each of the first IDTs and the second connection of each of the second IDTs.
11 more elements
A DMS filter, comprising:
- a first port and a second port;
- a piezoelectric material;
- and
- an electrode structure arranged above or on the piezoelectric material and electrically connected between the first port and the second port, wherein:
- the electrode structure has a multi layer construction,
- the multi layer construction comprises metal and dielectric material, the electrode structure comprising:
- a first reflector and a second reflector;
- first IDTs and second IDTs, wherein the first IDTs and the second IDTs are arranged between the first and the second reflectors;
- a first inter IDT connection and a second inter IDT connection;
- and
- a third inter IDT connection and fourth inter IDT connection, wherein:
- each of the first IDTs and each of the second IDTs have a first busbar and a first connection and a second busbar and a second connection,
- the first busbar and the first connection of each of the first IDTs are electrically connected via the first inter IDT connection,
- the second busbar and the second connection of each of the second IDTs are electrically connected via the second inter IDT connection, and
- each of the third inter IDT connection and the fourth inter IDT connection comprises an inner metal strip.
12 more elements
Dependencies are inferred from the claim text.