Crystal Vibrator Package with Corner Reinforcing Patterns
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Solution Overview
Problem
The manufacturing of mesa type crystal vibrators with low equivalent series resistance (ESR) is challenging due to their fragile configuration, making them difficult to produce and prone to damage.
Innovation Solution
A crystal vibrator package design that includes a base substrate with electrode pads, a crystal piece with exciting electrodes and reinforcing patterns on both surfaces, and connection electrodes, where the reinforcing patterns are electrically connected to the exciting electrodes and formed in a triangular or arc shape to enhance rigidity and reduce ESR.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a mesa type vibrator configuration is used to achieve low ESR, then energy efficiency is improved, but manufacturing difficulty increases and the structure becomes fragile
Solution Approach 1:
The patent applies local quality by adding reinforcing patterns specifically at the corner portions of the crystal piece, rather than uniformly thickening the entire structure. This localized reinforcement reduces ESR at critical areas while maintaining overall structural integrity and manufacturability, resolving the contradiction between low ESR and ease of manufacture
2Loss of energy
If a mesa type vibrator configuration is used to achieve low ESR, then energy efficiency is improved, but structural strength deteriorates
Solution Approach 1:
The reinforcing patterns are strategically placed at corner portions where stress concentration occurs, providing localized strength enhancement without requiring a uniform mesa structure. This approach maintains low ESR while improving structural strength at critical locations
Solution Approach 2:
The patent creates a composite structure by combining the crystal piece with reinforcing patterns formed of conductive material. This composite approach allows the crystal to maintain its piezoelectric properties while the reinforcing patterns provide additional mechanical strength and electrical connectivity
3Loss of energy
If a mesa type vibrator configuration is used to achieve low ESR, then energy efficiency is improved, but reliability deteriorates
Solution Approach 1:
The reinforcing patterns serve as preventive reinforcement at corner portions before damage can occur during manufacturing or operation. This prior cushioning approach protects the crystal piece from potential damage while maintaining the low ESR characteristics needed for energy efficiency
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 design significantly reduces ESR and enhances the rigidity of the crystal piece, improving its energy efficiency and reducing the likelihood of damage during manufacturing.
Implementation Method 1
The crystal vibrator uses a crystal having excellent piezoelectric characteristics and is made of a piezoelectric material. The crystal serves as a stable mechanical vibration generator.
Implementation Method 2
a reinforcing pattern formed at corner portions of the crystal piece... the reinforcing patterns are electrically connected to the exciting electrodes and formed in a triangular or arc shape to enhance rigidity
Implementation Method 3
the other side may be electrically connected to the first and second electrode pads, respectively, through a conductive adhesive
Data Source
AI summary
The crystal vibrator package includes a base substrate, a crystal piece, and a reinforcing patter. The base substrate includes first and second electrode pads formed on an upper surface of the base substrate. The crystal piece includes exciting electrodes formed on upper and lower surfaces thereof and electrically connected to the first and second electrode pads, respectively, at one side of the crystal piece. The reinforcing pattern is formed at corner portions of the crystal piece.