Grounded Vibrator Package Shielding Electromagnetic Noise
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Solution Overview
Problem
Existing vibrator devices suffer from electromagnetic noise interference due to externally attached components, which affects the stability of the circuit and increases the size of the device.
Innovation Solution
A vibrator device with a package that includes a semiconductor substrate base and lid, housing a vibrator element and passive element, an integrated oscillation circuit, and mounting terminals, where at least one of the base or lid is grounded, providing a shielding function to block electromagnetic noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If externally attached parts (capacitor, chip resistor, inductor) are mounted on a substrate to stabilize the circuit, then circuit stability is improved, but electromagnetic noise interference increases and device size increases
Solution Approach 1:
The patent combines the passive element with the base substrate to form an integrated unit. The passive element is mounted on the base along with the oscillation circuit, and both are enclosed together in a single package with a lid, eliminating the need for separate external mounting and reducing electromagnetic noise interference from external wiring and mounting pads.
Solution Approach 2:
The patent implements a nested structure where the oscillation circuit and passive element are housed within the base, which is then enclosed by the lid to form a compact integrated package. This nesting approach consolidates multiple components into a single unit, reducing the overall device size and minimizing electromagnetic noise exposure.
2Adaptability or versatility
If externally attached parts are mounted on a substrate, then circuit functionality is improved, but the device size increases
Solution Approach 1:
The patent merges the oscillation circuit and passive element into a single integrated package. Both components are mounted on the base substrate and enclosed together with a lid, eliminating the need for separate external mounting and reducing the overall device volume while maintaining full circuit functionality.
Solution Approach 2:
The base substrate serves multiple functions: it acts as the mounting platform for the oscillation circuit and passive element, provides structural support for the package, and when coupled to fixed potential, provides electromagnetic shielding. This multi-functionality reduces the need for additional components and reduces overall device size.
3Reliability
If externally attached parts are used, then circuit stability is improved, but electromagnetic noise emission increases
Solution Approach 1:
The patent nests the oscillation circuit and passive element within an enclosed package formed by the base and lid. This enclosure isolates the components from external electromagnetic noise while also containing the electromagnetic noise generated by the components, preventing it from affecting external circuits.
Solution Approach 2:
The base substrate, when coupled to fixed potential, acts as an electromagnetic shield or intermediary barrier between external electromagnetic noise sources and the sensitive internal components. This shielding function protects the circuit stability while minimizing noise emission to external circuits.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively suppresses electromagnetic noise, stabilizes circuit characteristics, and reduces the overall size of the device by preventing noise interference and allowing for more compact placement of circuit components.
Implementation Method 1
at least one of the base and the lid is coupled to fixed potential
Data Source
AI summary
A vibrator device includes a package including a base that is a semiconductor substrate and a lid that is a semiconductor substrate and has a housing section, a vibrator element and a passive element housed in the housing section and placed at the base, an oscillation circuit placed at the base and electrically coupled to the vibrator element, and a mounting terminal placed at the package and electrically coupled to the passive element, and at least one of the base and the lid is coupled to fixed potential.