Protective Debonding Stack for Selective IC Layer Transfer
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Solution Overview
Problem
Current layer transfer techniques in semiconductor manufacturing require full layer transfers, leading to increased costs and process complexity due to the need to etch away unneeded portions of the transferred layer.
Innovation Solution
The implementation of selective layer transfer techniques using a combination of selective release technology on a donor substrate and a patterned bonding template on a receiver substrate, allowing for the selective transfer of specific areas of a layer without transferring the entire layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If full layer transfer techniques are used, then complete layer transfer is achieved, but unneeded portions must be etched off increasing costs and process complexity
Solution Approach 1:
The patent divides the layer transfer process into selective segments by introducing a patterned bonding template that defines specific transfer regions. The bonding template contains adhesive areas arranged in patterns that correspond to desired transfer locations, allowing only selected portions of the layer to be transferred rather than the entire layer. This segmentation eliminates the need for post-transfer etching of unneeded portions.
Solution Approach 2:
The patent applies preliminary patterning to the bonding template before the transfer process. The adhesive areas on the bonding template are pre-configured in specific patterns that determine which portions of the layer will be transferred. This preliminary action of pattern formation on the bonding template guides the selective transfer process and eliminates subsequent etching steps.
2Manufacturing precision
If full layer transfer techniques are used, then complete layer transfer is achieved, but donor substrates cannot be reused increasing costs
Solution Approach 1:
By segmenting the transfer process through patterned bonding templates, only selected regions of the donor substrate are utilized for each transfer. The non-adhesive areas of the bonding template prevent transfer in those regions, allowing the donor substrate to be reused for subsequent transfers to different receiver substrates. This selective segmentation enables multiple uses of the same donor substrate.
Solution Approach 2:
The patent implements a system where the donor substrate is recovered and reused after selective transfer. The patterned bonding template allows controlled transfer of only needed portions, leaving the donor substrate intact for recovery and subsequent reuse. This recovering approach eliminates the loss of donor substrates that occurs with full layer transfer techniques.
3Adaptability or versatility
If selective release technology is used, then specific areas can be transferred, but additional process steps are required
Solution Approach 1:
The patent merges the bonding template formation and selective release functionality into a single integrated structure. The patterned bonding template combines the adhesive bonding function with the selective release function, where adhesive areas enable transfer and non-adhesive areas enable selective release. This merging eliminates the need for separate release layer deposition and patterning steps that would otherwise be required.
Solution Approach 2:
The bonding template serves multiple functions simultaneously: it provides adhesive bonding in selected areas, acts as a mask for selective transfer, and enables donor substrate reuse. This multi-functionality reduces the number of separate process steps needed compared to traditional selective release approaches that require dedicated release layers and patterning steps.
Data Source
AI summary
An embodiment discloses a method comprising receiving a substrate comprising a first layer, a second layer over the first layer, and a third layer over the second layer, the third layer comprising a plurality of integrated circuit (IC) components, and applying a laser to ablate portions of the first layer, wherein the second layer protects the third layer from cracking during application of the laser.