Crystal Oscillator Package Protrusions Adhesion
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Solution Overview
Problem
Existing crystal oscillator packages face challenges in achieving reliable adhesion between the electrode and the crystal oscillator, especially in harsh environments, due to issues with adhesive permeation in grooves or through-holes formed to increase the adhesion surface area.
Innovation Solution
The crystal oscillator package incorporates protrusions etched from the crystal piece, which extend from the lower surface and increase the adhesion area, allowing for improved bonding with conductive adhesives and connection electrodes, enhancing the reliability of the crystal oscillator package.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If grooves or through-holes are formed in the electrode pad to increase adhesion surface area, then adhesion area is increased, but adhesive permeation becomes difficult due to air film formation
Solution Approach 1:
Instead of forming grooves or through-holes in the electrode pad (conventional approach), the invention inverts the approach by forming protrusions on the crystal oscillator surface. This inversion allows the adhesive to naturally flow over the protrusions and bond to the electrode pad without the air film entrapment problem that occurs with grooves, thereby achieving both increased adhesion area and good adhesive permeation
Solution Approach 2:
The invention transitions from a two-dimensional flat electrode pad surface to a three-dimensional surface with protrusions. By adding vertical dimension through protrusions, the adhesion surface area is increased while maintaining adhesive access, as the adhesive can flow around and bond to the protrusion surfaces rather than being blocked by air films in grooves
2Reliability
If adhesion between electrode and crystal oscillator is improved for harsh environments, then reliability is improved, but manufacturing complexity increases
Solution Approach 1:
The crystal oscillator surface is segmented into multiple protrusions rather than remaining a single flat surface. This segmentation increases the adhesion area between the crystal oscillator and electrode pad, providing improved reliability in harsh environments while keeping the overall structure relatively simple and manufacturable
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 increased adhesion area provided by the protrusions significantly improves the reliability of the crystal oscillator package by ensuring a stronger bond between the crystal piece and the electrode pads, even in harsh environments.
Implementation Method 1
protrusions extending from an end portion of the lower surface of the crystal piece. The protrusions include two or more stages... The protrusions may increase an adhesion area
Implementation Method 2
a crystal oscillator uses a crystal having excellent piezoelectric characteristics as a piezoelectric material. Here, the crystal serves as a stable mechanical vibration generator
Data Source
AI summary
A crystal oscillator package includes a crystal piece configured to vibrate in response to an electrical signal, a first vibrating part protruding from an upper surface of the crystal piece, a second vibrating part protruding from a lower surface of the crystal piece, a first exciting electrode disposed on the first vibrating part, a second exciting electrode disposed on the second vibrating part, and protrusions extending from an end portion of the lower surface of the crystal piece. The protrusions include two or more stages.