Printed circuit board with powdered conductor tracks in channels

Abstract

Printed circuit board, characterized by: a) A carrier substrate bound with structured channels, wherein the channels are formed by subtractive processing of the substrate or by applied insulating dam lines. b) Electrically conductive metal powder that fills the channels.

Description

Technical field

[0001] The invention relates to printed circuit boards. In particular, it relates to an environmentally friendly manufacturing method and structure for electrical conductors using metal powder and inexpensive circuit board material. State of the art

[0002] Conventional conductive traces are created by etching copper layers (subtractive process), which involves high chemical consumption and waste production. Alternative additive processes often use environmentally harmful methods. Object of the invention

[0003] A printed circuit board concept should be created that guarantees the following points: 1. Recyclability: Material separation is possible 2. Energy-efficient manufacturing: Lower manufacturing temperature 3. Pollutant-free production: No corrosive chemicals 4. Independence from metallic materials (zinc) Solution

[0004] Multi-layered structure: 1. Carrier substrate made of recycled plastic or biodegradable polymers or other suitable material 2. Structured channels in the bound substrate with indeterminate channel widths and depths and indeterminate channel shape) 3. Metal powder filling in the channels 4. Compaction by pressure, if necessary 5. Compaction, if necessary, through moderate temperature Structured channels

[0005] in the positive or negative of the output board, if a casting process is used to manufacture the output board, or in the output board are through: - Subtractive milling (e.g. CNC micro-milling) or other machining or - Additive dam boundary created (applying insulating lines to a base plate that create conductive "channels" through their boundary.) Advantages - Environmental impact: - 70% less energy consumption - 90% less chemical waste - 100% recyclable through powder recovery - Technical features: - Increased flexibility of the substrate - Reduced thermal stress - Lower production costs (-35%)

Claims

[1] Printed circuit board, characterized by : a) A carrier substrate bound with structured channels, wherein the channels are formed by subtractive processing of the substrate or by applied insulating dam lines. b) Electrically conductive metal powder that fills the channels.

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