# wat does 65nm 90nm mean

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#### gunnala

##### Newbie level 6
wat does 65nm 90nm 130nm 180nm mean.....

kindly elaborate details around this topic.

##### Member level 5
Generally the feature size is refered to as 90nm or 100nm etc

nm(nanometer) meaning the feature size of the smallest transistor that can be manufactured with that particular technology.

Feature size is half the length of the channel of the smallest transistor that can be manufactured using that technology.

#### zeeshanzia84

##### Full Member level 3
It refers to Lmin of the MOSFETs that can be fabricated using that particular technology.

Lmin is the minimum channel length.

#### research235

##### Full Member level 6
NMOS and PMOS are defined by the gate lenght and width . the smallest gate length available in the library cells determines the technology .. For example the min gate length for a perticular Library is 65 nm .. then it catagorized as 65nm technolog.

suresh

#### naaj_ila

##### Member level 3
it means
half of the length of the transistor=65nm

less the size more the density

i think u herd that 65nm and 85nm from FPGA

altera Stratix 3 is of 65 nm technology
means the transistor which can be used in that fpga is of the length(half) of 65 nm
Length means distance between source and drain

okay man

#### pakitos

What is the topic? Is it NM or Nm or nm

1) NM may stand for:
-Nautical mile, a unit of length used for maritime and aviation purposes

2) nm may stand for:

-Nanometre, an SI unit of length, equal to 10-9 m (a thousand-millionth of a metre)

3) Nm may stand for:

-Newton metre (N m or N·m), a unit of moment
-Gene flow (when used is population genetics)

If you are confused just tell where did you get the numbers from to be able to help you
DO not forget to push the HELPED button

#### raju3295

##### Full Member level 4
generally a vlsi chip is measured with the technology used to manufacture it,,, and this technology name comes from the gate length of the smallest transistor used in the chip and generally techlogy enhances the gate size decreases ,,,it could be 65nm r 90nm ,,nm is nanometer

actually it is the half the gate length of a smallest transistor

#### ehsanelahimirza

##### Full Member level 6
it depends upon given data
it is nanao meter
some times it is source to drain
and some times complete inverter circuit of mosfet
and sometimes complete circuit of ic

#### sekapr

you already got the answer. it is actually Lmin of the transistor

#### kpsai26779

##### Member level 5
actually X nm technology represents that minimum dimension of poly layer that can be fabricated in that technology.

#### FLEXcertifydll

##### Full Member level 4
the minimum channel length

or the length of the gate

#### go4sandesh_vsn

##### Member level 4
hey ...in some of the above posts...ppl saying ....65 nm is "HALF" the channel length(i.e equal to Feature size)....whereas some saying its the channel length(tht means must be twice the Feature size)......

can someone clarify....watz the actual answer...as far as i m aware its the Lmin n not feature size(of course it can even be referenced wrt Feature size)

thnx a lot

#### skygazer

##### Junior Member level 3
lambda based rules are used for fabrication afaik.. where lambda is twice the minimum feature size.. so 65nm is the length of the channel..

#### deepakagarwal

##### Junior Member level 1
it is refers to the Lmin used in the CMOS .... 65nm means d min length of d cmos gate is 65nm.....

#### phanindar

##### Newbie level 3
65 and 90 nm referes to the Lmin of the transistor wafer.

#### gbaerf

##### Full Member level 2
Please check .. some of the good discussion is also done before also...

they have put some diagram also to explain

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#### pratap_v

##### Member level 4
It meant the feature size or the minimum length of the gate of a x tor.

#### chinnisunny

##### Junior Member level 3
Hi,
Nice topic.I have a question here.

1.What is the difference beween 90nm design flow and 130nm design flows.
Because as far i know as the technology shrinking Signal integrity effects(like crosstalk,EM,Antenna) come into picuture.

chinni.

#### kambojvikas

##### Newbie level 2
If chennal length is L then technology is 2L.

For higher abstract level you can say that minimum spacing between the chip element (transistor) is equal to technology

#### dtn_me

##### Junior Member level 3
die size

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