Community Service Project Proposal: Expanding STS2 Etch Capabilities for High Aspect Ratio/Deep Trenches PDF File: Community Service Project Proposal: Expanding STS2 Etch Capabilities for High Aspect Ratio/Deep Trenches This should be displaying Community Service Project Proposal: Expanding STS2 Etch Capabilities for High Aspect Ratio/Deep Trenches inline. If it's not, look to see if your browser is set to automatically download pdf files.