Expansion Retaining Ring With Soft Lip for Dicing Tape Protection

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Solution Overview

Problem

Existing expansion retaining rings face challenges in maintaining the annular shape of the ring body while ensuring flexibility of the ring-shaped lip, leading to potential damage to the dicing tape during expansion and issues with maintaining the ring's position on the frame under high tension.

Innovation Solution

The expansion retaining ring features a ring body made of metal and a detachably attached ring-shaped lip made of resin, with a larger outer diameter and an annular recessed part configuration, allowing for flexibility and secure attachment to the frame, reducing the risk of damage and maintaining the annular shape.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If a hard resin is applied to maintain the annular shape of the ring body, then the ring body maintains its shape, but the ring-shaped lip becomes too rigid and damages the dicing tape during expansion

Engineering Contradiction:

Improveannular shape of ring bodyVSAvoiddamage to dicing tape

Core Design Contradiction:

ShapeVSObject-affected harmful factors

Solution Approach 1:

The expansion retaining ring is divided into two distinct segments: a ring body and a ring-shaped lip. These segments are made from different materials with different properties, allowing each to fulfill its specific function independently. The ring body uses hard resin to maintain shape, while the ring-shaped lip uses soft resin to prevent damage.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different parts of the expansion retaining ring are given different material properties tailored to their specific functions. The ring body is made of hard resin for structural integrity and shape maintenance, while the ring-shaped lip is made of soft resin for gentle contact and flexibility during expansion, preventing dicing tape damage.

Inventive Principle:

Principle #3Local quality

2Object-affected harmful factors

If the thickness of the ring-shaped lip is reduced to reduce rigidity and prevent damage, then the flexibility increases, but the service life of the ring-shaped lip is shortened

Engineering Contradiction:

Improvedamage to dicing tapeVSAvoidservice life of ring-shaped lip

Core Design Contradiction:

Object-affected harmful factorsVSDuration of action of moving object

Solution Approach 1:

The expansion retaining ring utilizes composite construction with two different resin materials. The ring body is made of hard resin for durability and shape retention, while the ring-shaped lip is made of soft resin for flexibility and damage prevention. This composite approach allows the lip to be thin and flexible without compromising overall structural integrity, extending service life.

Inventive Principle:

Principle #40Composite materials

3Object-affected harmful factors

If a soft resin with low rigidity is applied to prevent damage, then the ring-shaped lip becomes flexible, but the annular shape of the ring body cannot be maintained under high tension, causing the ring to fall off the frame

Engineering Contradiction:

Improvedamage to dicing tapeVSAvoidannular shape of ring body

Core Design Contradiction:

Object-affected harmful factorsVSShape

Solution Approach 1:

The expansion retaining ring is segmented into a ring body and a ring-shaped lip that can function independently. The ring body uses hard resin to maintain the annular shape and prevent falling off the frame under high tension, while the ring-shaped lip uses soft resin to provide flexibility and prevent damage to the dicing tape.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different material properties are assigned to different locations within the expansion retaining ring. The ring body is made of hard resin for structural support and shape maintenance under tension, while the ring-shaped lip is made of soft resin for gentle contact with the dicing tape, preventing damage while maintaining overall structural integrity.

Inventive Principle:

Principle #3Local quality

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 maintains the annular shape of the ring body while ensuring flexibility of the ring-shaped lip, preventing damage to the dicing tape and ensuring the ring remains securely attached to the frame even under high tension, thereby extending the service life and reducing replacement costs.

Implementation Method 1

a ring-shaped lip formed of a material softer than the ring body, the ring-shaped lip being able to be detachably attached to an outer circumferential surface of the ring body

Methodology Applied

Scientific EffectMaterial softness/Flexibility: Elasticity

Data Source

PatentUS20250022744A1Expansion retaining ring

Publication Date: 2025.01.16 TOKYO SEIMITSU CO LTD

AI summary

To provide an expansion retaining ring that may maintain an annular shape of a ring body while ensuring flexibility of a ring-shaped lip. The expansion retaining ring includes a ring body and a ring-shaped lip formed of a material softer than the ring body, the ring-shaped lip being able to be detachably attached to an outer circumferential surface of the ring body and protruding outward from the outer circumferential surface of the ring body.