Patent ID: 11955950
Assignee: SHENZHEN SUNWAY COMMUNICATION CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A formation method of a filter device, comprising:
forming a first layer through the following steps: providing a first substrate, and forming a resonance device preprocessing layer, wherein the resonance device preprocessing layer has a first side and a second side opposite to the first side, and the first substrate is located on the first side, and wherein the step of forming the resonance device preprocessing layer comprises: forming an active preprocessing layer which is located on the first substrate, and forming a reflection preprocessing layer which is located on the active preprocessing layer, wherein the first side corresponds to the active preprocessing layer, and the second side corresponds to the reflection preprocessing layer;
forming a second layer through the following steps: providing a second substrate, and forming a first passive device, wherein the first passive device has a third side and a fourth side opposite to the third side, and the second substrate is located on the third side;
connecting the first layer and the second layer, wherein the first layer is located on the fourth side, and the second layer is located on the second side;
removing the first substrate; and
forming at least one first resonance device based on the resonance device preprocessing layer.