Load Lock Bonding Layout for Multi-Atmosphere Substrate Transfer
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Solution Overview
Problem
Existing bonding techniques for semiconductor devices face challenges in achieving high integration through three-dimensional stacking, particularly in efficiently transferring and processing substrates in different atmospheric conditions to facilitate effective chemical bonding.
Innovation Solution
A bonding system with a first and second transfer device for normal pressure atmosphere, a third transfer device for decompressed atmosphere, and a load lock chamber capable of switching between pressure atmospheres, along with surface modifying and hydrophilizing apparatuses, to facilitate the bonding of substrates using intermolecular forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single load lock chamber is used for substrate transfer, then the system structure is simple, but the transfer efficiency and productivity are reduced due to sequential operations
Solution Approach 1:
The load lock chamber is divided into multiple independent load lock chambers (first load lock chamber and second load lock chamber), each capable of independently accommodating and pressurizing substrates. This segmentation allows parallel processing of multiple substrates, significantly improving transfer efficiency and productivity without requiring complex coordination between shared resources
2Reliability
If multiple transfer devices operate in different atmospheric conditions, then the bonding quality is improved, but the device complexity and operational difficulty increase
Solution Approach 1:
The system segments transfer operations into distinct atmospheric environments: first transfer devices operate in a normal atmosphere load lock chamber, while second transfer devices operate in a decompressed atmosphere load lock chamber. This segmentation allows each transfer device to be optimized for its specific atmospheric condition, ensuring high bonding quality while simplifying operational control through dedicated atmospheric zones
Solution Approach 2:
The load lock chambers serve as intermediary zones that mediate between different atmospheric conditions. The first load lock chamber maintains normal atmosphere as an intermediary for loading substrates from the external environment, while the second load lock chamber maintains decompressed atmosphere as an intermediary for transfer to the bonding chamber, eliminating the need for direct atmospheric transitions and simplifying operation
3Manufacturing precision
If substrates are transferred sequentially through a single load lock chamber, then the system structure is simple, but the manufacturing precision and bonding uniformity are compromised
Solution Approach 1:
The system segments the substrate preparation process into parallel tracks: multiple first transfer devices can simultaneously load multiple substrates into the first load lock chamber under normal atmosphere, while multiple second transfer devices simultaneously transfer multiple substrates from the second load lock chamber under decompressed atmosphere. This parallel segmentation ensures uniform bonding conditions across all substrates while maintaining a relatively simple chamber configuration
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 efficient transfer and processing of substrates in varying atmospheric conditions, enhancing the bonding process for high integration of semiconductor devices.
Implementation Method 1
a bonding apparatus configured to bond the first substrate and the second substrate with each other
Data Source
AI summary
A first transfer device and a second transfer device are configured to transfer a first substrate and a second substrate in a normal pressure atmosphere. A third transfer device is configured to transfer the first substrate and the second substrate in a decompressed atmosphere. A load lock chamber has accommodation sections allowed to accommodate therein the first substrate and the second substrate, and is allowed to switch an inside of the accommodation sections between the normal pressure atmosphere and the decompressed atmosphere. Multiple gates are respectively disposed on three different sides of the load lock chamber, and allowed to open or close the load lock chamber. The first transfer device, the second transfer device, and the third transfer device carry the first substrate and the second substrate into/out of the load lock chamber through different gates among the multiple gates.