Electronic Device Housing With Nanograin Coating RF Window

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Solution Overview

Problem

Conventional electronic device housings made from high stiffness materials like metals and glass/carbon fiber-reinforced plastics face issues with RF transparency and mechanical strength, leading to complex and costly joining processes for integrating RF transparent antenna windows with the main enclosure.

Innovation Solution

A method involving a monolithic body of RF transparent material coated with a nanograin coating, where the coating is selectively removed to create an RF window, maintaining structural integrity and aesthetic continuity while allowing RF signals to pass through.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If high stiffness materials like metal and glass/carbon fiber-reinforced plastics are used for housing, then structural rigidity is improved, but RF transparency deteriorates

Engineering Contradiction:

Improvestructural rigidityVSAvoidRF transparency

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The housing is segmented into two functional zones: a main enclosure made from high-stiffness RF-opaque material (metal or glass/carbon fiber-reinforced plastic) for structural support, and an antenna window region made from RF-transparent material for signal transmission. This segmentation allows each zone to optimize its specific function without compromising the other.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The housing employs composite construction by combining RF-transparent material (such as plastic with low dielectric constant) in the antenna window region with RF-opaque high-stiffness material in the main enclosure. This composite approach enables simultaneous achievement of RF transparency where needed and structural rigidity where required.

Inventive Principle:

Principle #40Composite materials

2Reliability

If RF transparent plastics with low fiber content are used for antenna windows, then RF transparency is improved, but structural strength deteriorates

Engineering Contradiction:

ImproveRF transparencyVSAvoidstructural strength

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

Different regions of the housing are assigned different material properties: the antenna window region uses RF-transparent plastic with low fiber content to ensure signal transmission, while the main enclosure uses high-stiffness material for structural strength. Each local region has optimized quality appropriate to its function.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The housing structure is divided into distinct segments: a main enclosure providing structural support and an antenna window region providing RF transparency. This segmentation allows the antenna window to use weaker but more RF-transparent material without compromising overall housing strength, as the main enclosure bears the structural load.

Inventive Principle:

Principle #1Segmentation

3Ease of manufacture

If conventional joining processes like nano-molding, insert molding, or gluing are used to join main enclosure and antenna window, then integration is achieved, but manufacturing complexity and cost increase

Engineering Contradiction:

Improveintegration capabilityVSAvoidmanufacturing process complexity

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The main enclosure and antenna window are merged into a single integrated housing structure made from a uniform RF-transparent material. This eliminates the need for separate joining processes such as nano-molding, insert molding, or gluing, thereby reducing manufacturing complexity and cost while maintaining functional integration.

Inventive Principle:

Principle #5Merging (Combining)

4Reliability

If cutouts are made in the housing for RF signals, then RF transparency is improved, but structural integrity and aesthetic quality deteriorate

Engineering Contradiction:

ImproveRF transparencyVSAvoidstructural integrity

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

Instead of creating cutouts or openings in the housing for RF signal transmission, the invention inverts the approach by using a continuous monolithic housing structure made from RF-transparent material. This allows RF signals to pass through the material itself without requiring physical openings, thereby maintaining both structural integrity and aesthetic quality.

Inventive Principle:

Principle #13The other way round (Inversion)

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 enhances the structural rigidity of the housing, improves aesthetic appeal by avoiding cutouts, and provides effective RF transparency without compromising mechanical strength or increasing production costs.

Implementation Method 1

plating a surface of the monolithic body with a nanograin coating to increase the structural rigidity of the monolithic body

Methodology Applied

Scientific EffectNanograin coating: Deposition (physical)

Data Source

PatentUS20230354569A1Systems and methods for manufacturing electronic device housings

Publication Date: 2023.11.02 MICROSOFT TECHNOLOGY LICENSING LLC

AI summary

A method of manufacturing an electronic device housing includes obtaining a monolithic body of RF transparent material and plating a surface of the monolithic body with a nanograin coating to increase the structural rigidity of the monolithic body. A portion of the nanograin coating is thereafter removed to create an RF window.