Lambda based design rules

Lambda-based Design RulesLambda based . All device mask dimensions are based on multiples of , e. This actually involves two steps. A lambda scaling factor based on the pitch of various elements like transistors, metal, poly etc. Under or over-sizing individual layers to meet specific design rules.

CMOS LAMBDA BASED DESIGN RULES.

All that rules , as well as process parameters and analog simulation parameters are detailed here.

Consequently, the same layout may be . List of Rules to be Considered. Layout and Cross Section - NMOS. Reasons behind Rules : Contacts, Poly. Scalable Design Rules (e.g.

SCMOS, λ- based design rules ):. The use of lambda - based design rules must therefore be handled with caution in sub- micron geometries. Please note that the following rules are SUB-MICRON enhanced lambda based rules. Only rules relevant to the HP-CMOS14tb technology are presented here. In addition to the lambda rules , the micron rules for lambda =0.

Semiconductor Process Variance. Easily ported to many fabrication lines. Can scale to use smaller geometry in future. Conservative and less efficient in area because . Lecture : λ- based Design Rules. In this course you will learn the following.

Mead and Conwayt lttfifli to represent. A simple comparison with the lambda- based rules shows that there are significant differences. Therefore, lambda - based design rules are simply not useful for sub-micron . The design rules may change from foundry to foundry or for different technologies.

So to make the design rules generic the sizes, separations and overlap are given in terms of numbers of lambda (λ). The actual size is found by multiplying the . One lambda = one half of the “ minimum” mask dimension. NPTEL provides E-learning through online Web and Video courses various streams.

Design rules are an abstraction of the fabrication process that specify various geometric constraints on how different masks can be drawn. Design rules can be absolute measurements (e.g. in nm) or scaled to an abstract unit, the lambda. Rochester Institute of Technology.