Automated Microscopy Sample Coating for Tape-Reel Processing
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Solution Overview
Problem
Conventional coating processes for charged-particle-beam microscopy are inefficient, time-consuming, and require substantial human intervention, and are not suitable for coating samples already contained on a tape reel.
Innovation Solution
A coater apparatus with a process chamber, sample conveyor, and evaporant supply that allows for rapid, reliable, and automated deposition of a coating onto a sequence of samples, including those on a tape reel, using a controlled vacuum environment and precise control of the coating process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional coating processes are used for each sample individually, then coating quality can be maintained, but the process is slow and requires substantial human intervention
Solution Approach 1:
The process chamber is divided into multiple deposition zones along the tape reel path, allowing different sections of the tape to be coated simultaneously in separate zones. This segmentation enables parallel processing of multiple samples while maintaining controlled deposition conditions in each zone, thus improving throughput without sacrificing coating quality consistency
Solution Approach 2:
The system implements continuous coating of the tape reel as it passes through the process chamber, eliminating the stop-start nature of conventional individual sample coating. The evaporant supply operates continuously to deposit coating material across multiple samples simultaneously, maintaining productive action throughout the coating cycle rather than interrupting for each sample
2Adaptability or versatility
If conventional coating processes are used, then coating can be performed on individual samples, but the process cannot coat samples already contained on a tape reel
Solution Approach 1:
The process chamber and evaporant supply system are designed to handle multiple sample formats simultaneously - individual samples and tape-reel mounted samples. The same coating apparatus can process both formats using the same fundamental deposition mechanism, making the system universal and adaptable to different sample preparation workflows without requiring separate specialized equipment
Solution Approach 2:
The system transitions from processing samples in a single-file sequence to processing them across multiple spatial dimensions simultaneously. The tape reel allows samples to be arranged in a continuous linear array that passes through the chamber, enabling parallel coating across multiple samples at once rather than sequential processing of single samples
3Productivity
If rapid automated coating is implemented, then productivity improves, but reliability and consistency of coating may be compromised
Solution Approach 1:
The system incorporates feedback control through the controller that monitors and adjusts evaporant supply parameters during the coating process. By continuously monitoring deposition conditions and making real-time adjustments to maintain optimal parameters, the system ensures consistent coating quality across all samples on the tape reel while operating at high throughput speeds
Solution Approach 2:
The controller precisely manages evaporation parameters such as heating power, vapor flux, and deposition rate to maintain optimal coating conditions throughout the rapid automated process. By dynamically adjusting these parameters based on process requirements and monitoring data, the system achieves both high productivity and reliable coating consistency across multiple samples
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, automated coating of multiple samples with minimal human intervention, ensuring consistent and high-quality imaging by reducing beam-induced charging and sample damage.
Implementation Method 1
The coating material may be deposited onto the sample by vapor deposition, such as sputter coating
Implementation Method 2
An evaporant supply is provided to vaporize material from an evaporant source onto the samples at the deposition region
Implementation Method 3
a process chamber to maintain a low-pressure vacuum or controlled gaseous environment at a deposition region inside the process chamber
Data Source
AI summary
A coater is provided for depositing a coating onto a sequence of samples to be analyzed in a microscope. The coater includes a process chamber to maintain a low-pressure vacuum or controlled gaseous environment at a deposition region inside the process chamber, a sample conveyor to support and convey samples through the deposition region, an evaporant supply to vaporize material from an evaporant source onto the samples at the deposition region, and a controller to control one or more operations of the coater. The sample conveyor is adapted to convey the samples in discrete movements and/or the coater is adapted to provide one or more discrete pulses of power to the evaporant supply.