Crystal Oscillator Insulating Supports for Frequency Stability

Solution Overview

Problem

In electronic components like crystal oscillators, achieving high frequency stability is challenging due to uneven heat transfer from heating elements, leading to potential frequency instability and heat loss issues when lead terminals come into contact with the mounting substrate during adjustment or inspection.

Innovation Solution

The design includes a container with a first support and a second support, where the second support's protrusion is shorter than the first, and a projection portion serves as a stopper to prevent contact with the mounting substrate, reducing heat radiation and ensuring high frequency stability by minimizing heat conduction through the use of insulating materials and optimized support thicknesses.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If lead terminals are made long enough to reach outside the package for adjustment or inspection, then ease of operation is improved, but heat from the heating element transfers to the mounting substrate through the lead terminals, causing frequency stability to deteriorate

Engineering Contradiction:

Improveadjustment or inspectionVSAvoidfrequency stability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent introduces an insulating coating on the lead terminals and an insulating structure between the lead terminals and mounting substrate. This intermediary insulating layer blocks the heat transfer path from the heating element through the lead terminals to the mounting substrate, while still allowing electrical connection and adjustment functions to be performed.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If heat is transferred uniformly to the entire substrate using a heat-conducting plate, then frequency stability is improved, but heat escapes to the mounting substrate through lead terminals, causing temperature stability to deteriorate

Engineering Contradiction:

Improvefrequency stabilityVSAvoidtemperature stability

Core Design Contradiction:

ReliabilityVSTemperature

Solution Approach 1:

The patent introduces an insulating coating on the lead terminals and an insulating structure between the lead terminals and mounting substrate. This intermediary insulating layer blocks the heat transfer path from the heating element through the lead terminals to the mounting substrate, while still allowing electrical connection and adjustment functions to be performed.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If lead terminals are kept short to prevent contact with mounting substrate, then heat loss is reduced and frequency stability is maintained, but ease of adjustment or inspection is compromised

Engineering Contradiction:

Improvefrequency stabilityVSAvoidadjustment or inspection

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent introduces an insulating coating on the lead terminals and an insulating structure between the lead terminals and mounting substrate. This intermediary insulating layer blocks the heat transfer path from the heating element through the lead terminals to the mounting substrate, while still allowing electrical connection and adjustment functions to be performed.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

This configuration effectively reduces heat radiation and maintains high frequency stability in electronic components, preventing heat loss and ensuring accurate adjustments or inspections by preventing contact between the second support and the mounting substrate.

Implementation Method 1

heat from the heating element disposed on, for example, a substrate is not uniformly transferred to the entire substrate

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

it is possible to reduce the outflow of heat of the heating element to the mounting substrate

Methodology Applied

Scientific EffectThermal insulation: Thermal Insulation

Data Source

PatentUS10164568B2Electronic component, electronic apparatus, and moving object

Publication Date: 2018.12.25 SEIKO EPSON CORP

AI summary

An oscillator including a container, a first protrusion portion protruding from the container along a first direction, a second protrusion portion protruding from the container along the first direction, and a projection portion protruding from the container along the first direction. The second protrusion portion is shorter than the first protrusion portion in the first direction, and the projection portion is longer than the second protrusion portion and shorter than the first protrusion portion in the first direction.