Substrate Post Transfer Printing for Single-Pickup Component Placement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods of transfer printing require multiple transfers between a native source wafer and a destination substrate, increasing fabrication time and reducing manufacturing throughput in electronic systems like flat-panel displays and solar cells.
Innovation Solution
The use of patterned substrates with substrate posts for selective printing of components, where a transfer device picks up components from a source wafer and adheres them to the substrate posts on the destination substrate, allowing for improved throughput and functionality by reducing the need for multiple pickups from the source wafer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple transfers are performed between source wafer and destination substrate, then component population coverage is improved, but fabrication time increases and manufacturing throughput decreases
Solution Approach 1:
The destination substrate is pre-patterned with substrate posts before component transfer. This preliminary structuring enables selective adhesion of components to specific posts during a single transfer operation, eliminating the need for multiple sequential transfers to achieve complete component population coverage.
Solution Approach 2:
The destination substrate is divided into multiple substrate posts that are spatially separated. Each post can independently receive a component during a single transfer operation, allowing parallel population of multiple locations simultaneously rather than sequential filling.
2Quantity of substance
If multiple transfers are performed between source wafer and destination substrate, then complete component population is achieved, but fabrication time increases
Solution Approach 1:
The destination substrate is pre-patterned with substrate posts before component transfer. This preliminary structuring enables selective adhesion of components to specific posts during a single transfer operation, eliminating the need for multiple sequential transfers to achieve complete component population coverage.
Solution Approach 2:
The transfer device can perform multiple print operations to different locations on the destination substrate in continuous sequence without returning to the source wafer. This continuous printing action from a single pickup minimizes idle time and reduces total fabrication time while achieving complete component population.
3Ease of manufacture
If components are arranged according to source wafer and stamp post arrangement, then transfer process is simplified, but component arrangement flexibility on destination substrate is reduced
Solution Approach 1:
The substrate posts are patterned with specific spatial arrangements and geometries tailored to the desired component layout on the destination substrate. This local structuring allows components to be positioned in optimized configurations for device performance while maintaining a relatively simple single-step transfer process.
Solution Approach 2:
The invention introduces vertical dimension through substrate posts that protrude from the destination substrate surface. This three-dimensional structure allows components to be selectively adhered to posts at specific locations, enabling flexible two-dimensional component arrangement patterns on the destination substrate while using a relatively simple transfer process.
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
This approach enhances manufacturing efficiency by allowing multiple component prints without intervening pickup steps, thereby increasing throughput and improving the arrangement of components on the destination substrate.
Implementation Method 1
picking up the components from the component source wafer by adhering the components to the transfer device
Implementation Method 2
printing one or more of the picked-up components to the patterned substrate by disposing each of the one or more picked-up components onto one of the substrate posts
Data Source
AI summary
A method of printing comprises providing a component source wafer comprising components, a transfer device, and a patterned substrate. The patterned substrate comprises substrate posts that extend from a surface of the patterned substrate. Components are picked up from the component source wafer by adhering the components to the transfer device. One or more of the picked-up components are printed to the patterned substrate by disposing each of the one or more picked-up components onto one of the substrate posts, thereby providing one or more printed components in a printed structure.