Fluororesin Interfacial Agent for LED Packaging

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Solution Overview

Problem

Conventional Si—O-based packaging materials for deep ultraviolet LEDs suffer from poor ultraviolet transmittance and photolysis, leading to inadequate light output and heat transfer, and the use of fluoropolymers with poor adhesive capacity complicates the sandwich structure, making them unsuitable for reliable LED packaging.

Innovation Solution

A fluororesin interfacial agent comprising a graphene oxide fluororesin sealant and a KH550 silane coupling agent solution is developed, where graphene oxide powder reacts with the silane coupling agent to form molecular crosslinking, enhancing the bonding capability and reliability of the sealant in LED packaging.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If fluoropolymer is used as sealant material, then ultraviolet transmittance and ultraviolet stability are improved, but adhesive capacity deteriorates

Engineering Contradiction:

Improveultraviolet stabilityVSAvoidadhesive capacity

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The patent uses a composite material system consisting of fluororesin matrix combined with graphene oxide and KH550 silane coupling agent. The fluororesin provides ultraviolet stability while the silane coupling agent and graphene oxide enhance adhesive capacity, resolving the contradiction between ultraviolet stability and adhesive strength.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent modifies the chemical parameters of the fluororesin by introducing silane coupling agents and graphene oxide, changing the surface properties and molecular structure to simultaneously achieve both ultraviolet stability and improved adhesion to the chip and quartz lens.

Inventive Principle:

Principle #35Parameter changes

2Strength

If conventional Si-O-based packaging material is used, then adhesive capacity is improved, but ultraviolet transmittance and photolysis resistance deteriorate

Engineering Contradiction:

Improveadhesive capacityVSAvoidultraviolet transmittance

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The patent replaces conventional Si-O-based materials with a fluororesin-based composite material that inherently provides superior ultraviolet transmittance and photolysis resistance while maintaining or improving adhesive capacity through the addition of silane coupling agents and graphene oxide.

Inventive Principle:

Principle #40Composite materials

3Strength

If air barrier is formed in sandwich structure, then bonding capability is improved, but light output power and heat transfer deteriorate

Engineering Contradiction:

Improvebonding capabilityVSAvoidlight output power

Core Design Contradiction:

StrengthVSLoss of energy

Solution Approach 1:

The patent uses a thin film sealant formulation that provides adequate bonding capability while minimizing thickness to reduce light absorption and thermal resistance, thereby maintaining light output power and heat transfer efficiency.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The patent optimizes the viscosity and curing characteristics of the sealant to achieve proper bonding without excessive thickness, balancing bonding capability with light transmission and thermal conduction requirements.

Inventive Principle:

Principle #35Parameter changes

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 significantly improves the bonding capability and reliability of LED packaging, ensuring better light output and heat transfer while resisting environmental erosion, as demonstrated by enhanced anti-aging capabilities in light attenuation accelerated aging tests.

Implementation Method 1

graphene oxide powder in the graphene oxide fluororesin sealant chemically reacts with the KH550 silane coupling agent, and molecular crosslinking is formed

Methodology Applied

Scientific EffectChemical reaction: Chemical Bonding

Implementation Method 2

molecular crosslinking is formed, which tightly fixes a bonding interface and a fluororesin matrix

Methodology Applied

Scientific EffectMolecular crosslinking: Chemical Bonding

Implementation Method 3

S-type fluoropolymer has excellent ultraviolet transmittance, strong ultraviolet stability

Methodology Applied

Scientific EffectUltraviolet transmittance: Absorption (EM radiation)

Implementation Method 4

strong ultraviolet stability and plays an important role in improving the performance of the deep ultraviolet LED

Methodology Applied

Scientific EffectPhotolysis resistance: Photodissociation

Implementation Method 5

KH550 silane coupling agent solution...tightly fixes a bonding interface

Methodology Applied

Scientific EffectAdhesion: Adhesive

Data Source

PatentUS10930827B2Fluororesin interfacial agent for LED packaging, and methods for preparing and using same

Publication Date: 2021.02.23 EZHOU INST OF IND TECH HUAZHONG UNIV OF SCI & TECH

AI summary

Disclosed are a fluororesin interfacial agent for LED packaging, and a method for preparing and using the same. The fluororesin interfacial agent for LED packaging comprises a graphene oxide fluororesin sealant and KH550 silane coupling agent solution. Graphene oxide powder in the graphene oxide fluororesin sealant chemically reacts with the KH550 silane coupling agent, and molecular crosslinking is formed, which tightly fixes a bonding interface and a fluororesin matrix like countless molecular anchors, and which greatly improves the bonding capability of fluororesin sealant and ensures the reliability of LED packaging.