Printed Circuit Board Glass Layer with Variable Transmittance

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The transparency of glass materials used in multichip packages poses an issue during processes and inspections that utilize light, leading to potential errors and reduced reliability.

Innovation Solution

A printed circuit board is designed with a glass layer having distinct regions of different transmittance, where one region is non-transparent or has low transmittance, preventing light from passing through and minimizing errors during light-based processes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If glass materials are used in multichip packages, then reliability is improved, but transparency causes errors during light-based processes and inspections

Engineering Contradiction:

ImprovereliabilityVSAvoidinspection accuracy

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The glass layer is divided into different regions with different transmittance properties. A first region has first transmittance and a second region has second transmittance different from the first, allowing different areas of the same glass layer to serve different functions: one area maintains transparency for light-based processes while another area provides opacity to prevent inspection errors

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The glass layer is segmented into multiple functional regions with different optical properties. The glass layer includes a first region and a second region, where each region can be positioned at different locations relative to wiring layers, creating distinct functional zones within the single glass layer structure

Inventive Principle:

Principle #1Segmentation

2Ease of manufacture

If glass layer is transparent, then light-based processes can proceed, but wiring layers on opposite sides interfere with each other

Engineering Contradiction:

Improvelight-based process capabilityVSAvoidsignal integrity

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

Different regions of the glass layer have different transmittance properties to localize optical functions. The first region with first transmittance and second region with second transmittance allow specific areas to permit light transmission while other areas block light, preventing interference between wiring layers on opposite sides in specific regions

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

The printed circuit board achieves improved reliability and prevents errors during light-based processes and inspections by ensuring that light does not interfere with wiring layers on opposite sides of the glass layer.

Implementation Method 1

a glass layer having a first region having first transmittance and a second region having second transmittance, different from the first transmittance

Methodology Applied

Scientific EffectLight transmittance: Absorption (EM radiation)

Data Source

PatentUS20250081340A1Printed circuit board

Publication Date: 2025.03.06 SAMSUNG ELECTRO MECHANICS CO LTD

AI summary

A printed circuit board includes a glass layer having a first region having first transmittance and a second region having second transmittance, different from the first transmittance, and a first wiring layer disposed on the glass layer.