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US 12,418,761 B2Granted
Diaphragm for microspeaker and manufacturing method thereof
Assignee3M Innovative Properties Company
InventorsChao Yang, Christopher B. Walker, Jr.
Life of this patent
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Assignee3M Innovative Properties Company
InventorsChao Yang, Christopher B. Walker, Jr.
Estimating the term…
The invention provides a diaphragm for a microspeaker and a manufacturing method thereof. The diaphragm is a single-layer diaphragm or a multi-layer diaphragm and comprises at least one layer of a chemically cross-linked thermoplastic polyester elastomer, wherein: the chemically cross-linked thermoplastic polyester elastomer has a loss factor less than or equal to 0.4 at a temperature range not higher than a softening temperature of thermoplastic polyester elastomer before chemical crosslinking plus 40° C., as measured by a rheological curve; and the diaphragm further has a yield strain in the range of 7% to 30%. The diaphragm for a microspeaker according to the technical solution of the present invention is easy to be prepared by thermoforming, and has appropriate modulus, good strength, elasticity, and thermal stability.
A diaphragm for a microspeaker, the diaphragm being a single-layer diaphragm or a multi-layer diaphragm and comprising at least one layer of a chemically cross-linked thermoplastic polyester elastomer, wherein the chemically cross-linked thermoplastic polyester elastomer has a loss factor less than or equal to 0.4 at all temperatures in a temperature range not higher than a softening temperature of thermoplastic polyester elastomer before chemical crosslinking plus 40° C., as measured by a rheological curve, and wherein the diaphragm further has a yield strain in the range of 7% to 30%.
Dependencies are inferred from the claim text.