| Yield
Improvement By RUBICAD's TopQuality Migration Service
RUBICAD’s
TopQuality Service offers a number of different ways for significant yield
improvement. There are several kinds of failures that influence overall
yield.
Design
specification failure
Even though
a design may be functionally correct and working, it might not pass the
parameter tests, which check for power consumption, speed or other performance
parameters. “Performance yield” can be significantly increased by increasing
the overall performance level. For example, if power consumption is the
reason for low yield, RUBICAD’s TopQuality Service utilizes the LADEE tool
suite to reduce power consumption in the design process. This can be done
by applying CrossSpeed to the layout of the circuit to reduce capacitance
between wires and to optimize the transistors’ W/L. The reduction of wire
capacitance and gate capacitance will also have a positive effect on average
circuit speed, which will further increase the yield.
Optimum
design rules
For ultra
deep sub-micron technologies, it is very important to use the optimum design
rules during physical design implementation. Compromised design rules used
in combination with a linear shrink violate the optimum rules and cause
significant yield losses. Test data has shown that a 5% violation in some
rules can cause a yield loss of 10% or more. RUBICAD’s TopQuality Service
utilizes the LADEE tool suite to enforce the optimum design rules, thereby
maximizing yield.
Slack design
rules
Foundries
and IC companies have begun to define slack design rules for their process
technologies. Slack design rules are recommended rules that should be used
when space is available. Some design rules are more critical than others.
For example, in some technologies the contact-to-gate spacing is very critical,
so the recommended rule is to use fewer contacts to connect the source
drain area of the gates, and whenever possible to use a 10% larger spacing.
This change can result in a significantly higher yield without increasing
the die size.
RUBICAD’s
TopQuality Service utilizes the LADEE tool suite that allows the implementation
of such slack rules automatically and efficiently,without increasing the
silicon area.
The LADEE
Tool Suite can be used to improve yield in all of these ways within a single
integrated design flow. The yield improvement can be combined with verification
tasks, such as DRC or design migration, so that no additional design steps
or iterations are required. After all, yield improvement is the cheapest
source of additional dies!
RUBICAD's
design and layout migration specialists work with your team to deliver
best-in-class solutions. You reduce your development risk while increasing
your ability to deliver designs on time.
Call (408)
995 3334 or send an email to service@rubicad.com
and discuss your next design challenge with us.
Check out
the success stories on this site and learn how other companies have leveraged
their designs.
 Back
to Top
|
