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In photolithography, several masks are used in turn, each one reproducing a layer of the completed design, and together known as a mask set. A curvilinear photomask has patterns with curves, which is a departure from conventional photomasks which only have patterns that are completely vertical or horizontal, known as manhattan geometry.
A crack arrestor (otherwise known as a rip-stop doubler) is a structural engineering device. Being typically shaped into ring or strip, and composed of a strong material, it serves to contain stress corrosion cracking or fatigue cracking, helping to prevent the catastrophic failure of a device.
Illustrator 88, the product name for version 1.7, [6] was released in 1988 and introduced many new tools and features. [ 7 ] Byte in 1989 listed Illustrator 88 as among the "Distinction" winners of the Byte Awards, stating that with it Adobe had "pulled ahead" of previously industry-dominant competitor Aldus FreeHand .
Blanking produces the outside features of the component, while piercing produces internal holes or shapes. The web is created after multiple components have been produced and is considered scrap material. The "slugs" produced by piercing internal features are also considered scrap. The terms "piercing" and "punching" can be used interchangeably.
Perpetually ventilated by flying bullets, an iconic Fosdick trademark was the "Swiss cheese look"—with smoking bullet holes revealing his truly two-dimensional cartoon construction. The impervious detective considers the gaping holes "minor scratches" or "mere flesh wounds" however, and always reports back in one piece for duty the next day.
CorelDRAW is a vector graphics editor developed and marketed by Alludo (formerly Corel Corporation). It is also the name of the Corel graphics suite, which includes the bitmap-image editor Corel Photo-Paint as well as other graphics-related programs (see below).
Notches are commonly used in material impact tests where a morphological crack of a controlled origin is necessary to achieve standardized characterization of fracture resistance of the material. The most common is the Charpy impact test , which uses a pendulum hammer (striker) to strike a horizontal notched specimen.
The mask cost strongly benefits from the use of multiple patterning. The EUV single exposure mask has smaller features which take much longer to write than the immersion mask. Even though mask features are 4x larger than wafer features, the number of shots is exponentially increased for much smaller features.