Download Handbook of VLSI Microlithography, 2nd Edition, Second by John N. Helbert PDF

By John N. Helbert

This instruction manual supplies readers a detailed examine the full expertise of printing very excessive solution and excessive density built-in circuit (IC) styles into skinny withstand approach move coatingsГѓВ№including optical lithography, electron beam, ion beam, and x-ray lithography. The books major topic is the particular printing approach had to in attaining quantity excessive density IC chip creation, particularly within the Dynamic Random entry reminiscence (DRAM) undefined. The e-book leads off with a comparability of varied lithography tools, protecting the 3 significant patterning parameters of line/space, answer, line side and development characteristic size keep an eye on. The books rationalization of face up to and withstand method apparatus know-how may be the 1st sensible description of the connection among the withstand strategy and kit parameters. the fundamentals of withstand know-how are thoroughly coveredГѓВ№including a whole bankruptcy on withstand strategy defectivity and the capability yield proscribing impression on machine production.Each replacement lithographic method and trying out process is taken into account and evaluated: simple metrology together with optical, scanning-electron-microscope (SEM) innovations and electric try out units, besides motives of exact printing instruments and their layout, building and function. The editor devotes a complete bankruptcy to todays refined, advanced electron-beam printers, and to the rising x-ray printing expertise now utilized in high-density CMOS units. vigorous ion particle printing is a controllable, steerable expertise that doesn't depend on withstand, and occupies a last component of the instruction manual.

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Handbook of VLSI Microlithography, 2nd Edition, Second Edition

This instruction manual provides readers an in depth examine the full expertise of printing very excessive answer and excessive density built-in circuit (IC) styles into skinny face up to method move coatingsГѓВ№including optical lithography, electron beam, ion beam, and x-ray lithography. The books major topic is the exact printing approach had to in attaining quantity excessive density IC chip creation, in particular within the Dynamic Random entry reminiscence (DRAM) undefined.

Extra resources for Handbook of VLSI Microlithography, 2nd Edition, Second Edition

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A properly designed catadioptric lens centralizes the power to refractive elements where reflection angles are affected less by barometric changes. Intrafield CD control is also less affected due to a smaller aberration susceptibility and these systems have a smaller dependence upon laser bandwidth centering, thus bandwidths greater than 50 pm are acceptable. Refractive stepping systems do not have this technical advantage, another reason for employing the S&S systems. [40] He reasons that a scanner lens, having a smaller diameter is easier to manufacture and should have less aberration.

Optical system lenses must be diffraction limited, which means their aberrations determined by ray tracing through the optics must be dimensionally less than the exposure wavelength. These aberrations are a composite from design to fabrication errors. Most importantly, he stipulates the critical scaling characteristics are proportional to field size and that lens material costs are proportional to the cube of the field size. Scanners obtain sufficient exposure field to accommodate ever larger die without expensive and large refractive lenses.

Very High Volume/One Product Class. This class is nearly totally inflexible with only one process and one product. Economics is the dominant consideration especially when considering volume. As such, throughput and yield are the two key parameters. The process and product are the most mature of any class. Yield is paramount and throughput is a close second. Repeatability, availability (including reliability) along with the most simplified operation are the dominant issues. No development is ever done on this line which consists of the most streamlined of product flows with as few operations as can be tolerated.

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