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Metal Layer Width

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31 Threads found on edaboard.com: Metal Layer Width
Why do we have a maximum width rule for metal layers? Or why do we use metal slotting instead of using a wide metal layer??
Why are upper metal layers wider than the lower ones? Is that due to lithography reasons? Say if we layout a lower layer wider than the min required and same width as one of the upper layers, which of these offer low resistance? i.e., among a M1 of width W and M3 of same (...)
I think it is width/spacing because metal layers are mentioned
Hi, I am trying to write Skill code for changing the width of the layer. Can anybody give any example
One geometry constraint is the minimum allowed line width and line spacing. These values depend on the metal layer where you put your spiral, and can be found in the technology documentation (layout rules). Typically, we want to place the spiral as far away from the substrate as possible, so we use the topmost metal (...)
Hi, What are the rules or how the maximum metal width is decided in any particular technology i.e. 130nm or 65nm. ? OR On What basis maximum metal width is decide in any technology?
Hi, Generaly, you should use couple of upper metal layers (but not the highest, as the highest layers are used for Power wire structures, such as Rings and Stripes) due to small resistance thay have (low R parasicits)
If we consider a chip with many blocks like dsp block, adc block ............ for interconnection within a DSP block we could use a lower metal for routing, since the length of the lower metal will be small if routed with in a block, so the width of the lower metal is reduced, such that resistance does not effect the (...)
I would not use leHiCreate... I would say for you the easiest way is to use multi part path mpp For example 20um wide metal bus: ;The template name is : M5_Bus_20u, leDefineMPPTemplate( ?techId tech ?name "M5_Bus_20um" ?layer list("metal5" "drawing") ?width 20.000000 ?choppable nil ?endType (...)
Firstly it is not the metal etching that rounds off square corners. This is due to the camera that prints the layer prior to etching. The camera cannot completely resolve a square corner as it uses a finite wavelength which limits its resolution. To accurately image a square corner exactly would require infinite resolution. So this is a fundamenta
I don't think so viswanadh_babu. Using Wide wires obliges you to use more metal layers. Anoter problem is is that capacitance coupling between wires in layer n and n+1 will increase.
When I do a probe test for my inductor(formed by two metal layer and a via trench), it seems that the Q value is much lower than HFSS result and the L value is normal, the most critical thing is the peak Q freq shift from 4G of simulation to 1.7G of test, what will cause that? PS: the inductor is about 600 pH and the metal (...)
When I do a probe test for my inductor(formed by two metal layer and a via trench), it seems that the Q value is much lower than HFSS result and the L value is normal, the most critical thing is the peak Q freq shift from 4G of simulation to 1.7G of test, what will cause that? PS: the inductor is about 600 pH and the metal (...)
The higher metal layer,the wider and thicker of metal layer leads to delay less.but the capacitance between metals in the same layer is more and SI is becoming a question.
why don't you use 2 metal layer with vias between them? Then you can say 8ma/2 = 4mA=> 4um
A wiretrack is typically defined by the center-to-center spacing of metal. It can vary by layer if the width or spacing requirements are different per layer.
hi based on u r choose u want 3or 4 or 5 metal layer u r using for clock rounting.and u maintance the double width and double space of the clock routing vamsi krishna
Can anyone tell me wt is lef offset and fat to nonfat spacing , fat to fat width its given for each and every metal layer wts that?
The widths of the power mesh and ring is decided based on the total expected power consumption by the design. It also depends on the metal layer to be used for the power mesh and ring ( current limit on the metal layer).
Dear all : In RFCMOS 0.18um Process , why metal 5 need wider width than other metal layer ? Thanks .