Thickness also has big implications for next-gen products. Flexible displays are starting to mature on the market for consumers but they require thinner film coatings so that they can bend as needed. Film Uniformity Uniformity is one of the most important properties across all applications and coatings.
If thickness distribution is not even, it could inhibit durability and performance for the entire film. Some substrates also have a more complex topography, with bumps and vias present, but the thickness also needs to remain consistent across the surface. Uniformity affects other important production factors such as yield and cost of ownership, along with thin film performance. Better thickness uniformity means more usable parts are produced, but the costs of achieving uniformity with a particular system or configuration must also be considered and weighed.
Grain size Solid metals are composed of individual crystallites or particles, and the size of these particles is referred to as grain size. Grain size itself determines many other properties specific to the metal, most notably its density. High energy and higher migration between particles leads to a smaller grain size, while lower energy and lower migration leads to a larger grain size. Density is inversely proportional to the grain size, so for applications requiring a high density, you want a coating that has more migration between particles and a smaller grain size.
Yield Yield is determined by the number of usable parts that are produced by your thin film deposition system. Reaching a high yield is also impacted by performance requirements. Throughput Throughput refers to how many substrates your thin film deposition system can coat per hour. For high-volume applications, having a system that can keep up with high throughput requirements is critical.
Lower volume applications may not require such a high throughput, allowing you to focus on performance-related properties instead. If a coating has good adhesion, it will stick tightly to the wafer or substrate, which raises production yield and also increases overall reliability. Good adhesion leads to a better user experience thanks to improved device performance and a longer lifetime. This is a qualitative idea that does not lend itself easily to screening.
However, a second consideration that he emphasizes is that investors should pursue stocks showing strong upward price movement. Shares outstanding should be a small and reasonable number. The less stock available, the more buying will drive up the price. Companies buying back their stock on the open market are preferred, as well as companies with management stock ownership. Criteria: Shares outstanding lt; 25 million shares Leader or laggard? O'Neil suggests buying quot;the leading stock in a leading industryquot;.
Criteria Index trading above its rising day moving average Index trading above its rising week moving average Does it Work? However, AAII data suggests that this screen has seen a Some investors have criticized the strategy when they didn't use the stop-loss criterion but O'Neil has replied that you have to use the whole strategy and not just the parts you like.
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