Question on MOCMOS objects' dimension precision

[Alexandre Rusev]

Hello.

Why I can't  set width of something (poly1 arc or poly1 pure layer) to 1.333 (lambda) in MOCMOS technology even if units precision is set say to 8?

When I press apply the value of 1.333 is changed to 1.335

Screenshot attached

[Steven Rubin]

The problem is that Electric reduces all values to integers at some
point in order to assure correct precision when dealing with large
numbers. As a result, the fine-tuning of the numbers to the right of the
decimal point is limited. Asking for 8 digits to the right of the
decimal point only tells Electric how many digits to print when writing
numbers. It does not guarantee that this much precision is available.

   -Steven Rubin

On 11/6/2025 3:29 PM, Alexandre Rusev wrote:
>
> Hello.
>
> Why I can't  set width of something (poly1 arc or poly1 pure layer) to
> 1.333 (lambda) in MOCMOS technology even if units precision is set say
> to 8?
> When I press apply the value of 1.333 is changed to 1.335

> .

[Alexandre Rusev]

OK, thank you!

I guess that increasing number of decimals may be quite error prone ...:(

I observe strange behaviour when use lambda=10nm, so I wanted work it around increasing number of decimals and use lambda=60.

Alex

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