The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 16, 2025
Filed:
Mar. 14, 2023
Quantumz Inc., Kaohsiung, TW;
Gang-Lin Zhang, Kaohsiung, TW;
Meng-Hua Tsai, Tainan, TW;
Weiting Lee, Kaohsiung, TW;
Sin-Siang Wang, Kaohsiung, TW;
QuantumZ Inc., Kaohsiung, TW;
Abstract
A three-dimensional (3D) filter and a fabrication method thereof are provided. The 3D filter includes a circuit board, a first ring resonator, a second ring resonator and a via structure. The circuit board includes a first circuit layer, a second circuit layer and a third circuit layer. The third circuit layer is located between the first circuit board and the second circuit board. The first ring resonator is disposed in the first circuit layer and has a first ring surrounded area corresponding to a first cut-off frequency band. The second ring resonator is disposed in the second circuit layer and has a second ring surrounded area corresponding to a second cut-off frequency band. The via structure passes through the first circuit layer, the second circuit layer and the third circuit layer, and is electrically connected to the first ring resonator and the second ring resonator.