Patterned Release Layer for Individual Microelectronic Device Removal
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Solution Overview
Problem
Existing methods for manufacturing microelectronic devices on a carrier substrate do not allow for individual removal of devices using standard component handling equipment, as the devices are fragile and vulnerable without a handling substrate, and require separation of a glass plate to prevent devices from falling apart.
Innovation Solution
A method involving a subassembly with a patterned release layer and adhesion layer, where through-holes are created in a handling substrate to act as separation lanes, allowing for air gaps and individual device removal by selective cleavage of the adhesion layer, using an organic release layer that can be easily decomposed and an inorganic adhesion layer for mechanical anchoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If devices are processed on a carrier substrate without a handling substrate, then manufacturing complexity is reduced, but individual device removal becomes impossible and devices become fragile and vulnerable
Solution Approach 1:
The patent divides the carrier substrate into multiple regions: a handling substrate region that provides mechanical support and fragility resistance, and a release layer region that enables device separation. This segmentation allows devices to be both protected during processing and individually removable afterward, resolving the contradiction between structural simplicity and device reliability.
2Reliability
If a glass plate is used to prevent devices from falling apart, then device integrity is maintained, but standard component handling equipment cannot be used and additional separation steps are required
Solution Approach 1:
The patent introduces a handling substrate as an intermediary layer between the devices and the external environment. This handling substrate provides the mechanical strength needed to prevent device fragility while simultaneously serving as the interface for standard component handling equipment, eliminating the need for glass plates and additional separation steps.
3Ease of operation
If through-holes are created in the handling substrate to enable individual device removal, then handling ease is improved, but manufacturing precision is required for precise separation lane width control
Solution Approach 1:
The patent controls the width and positioning of through-holes in the handling substrate by adjusting manufacturing parameters such as etch depth, etch rate, and hole spacing. This parameter control enables precise definition of separation lanes, allowing standard handling equipment to operate effectively while maintaining the required manufacturing precision for device separation.
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
Enables individual removal of microelectronic devices from the carrier substrate using standard equipment, increasing yield and reducing costs by allowing for precise control of separation lane width and minimizing residue, while maintaining device integrity and stability.
Implementation Method 1
an organic release layer, which can be easily decomposed
Data Source
AI summary
Individual devices (100) are locally attached to a carrier substrate (10), so that they can be removed therefrom individually. This is achieved through the use of a patterned release layer, particularly a layer that is removable through decomposition into gaseous or vaporized decomposition products. The mechanical connection between the carrier substrate (10) and the individual devices (100) is provided by a bridging portion (43) of an adhesion layer (40).