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Step-by-step tutorial of how to start OrCAD Layout.
The Connexions version of the OrCAD tutorial is still in development. Please click here for the original and complete tutorial. You may also browse this complete tutorial within Connexions by using the Mozilla browser and accessing the main Connexions page at (External Link) . Click on the 'Contents' tab and select Rice University ELEC 424/427 under the 'Courses' tab.

Creating a new board

You have everything that you need to import your design into Layout. We need to do one thing before we begin. Layout will try to match the names of the footprints in your netlist with those stored in the Library Manager . Your library must be at the top of the list in Library Manager or the import will not work. Open Library Manager and make sure that your library appears at the top of the list like in the figure below.

Now start Layout and select File-->New . You will first be prompted for the template file you created. It should be located in your board directory. Second, you will be asked for your netlist. This should be located in your sch directory. Third, you will be asked to give your board file a name. Name this file Elec424Tutorial and place it in the board directory.

If all the footprint names in your design match those in your library, then you should get no errors and you will see a screen in layout like the one below.

If you got one or more errors, then it probably means that you have a misspelled footprint name. Sometimes, you can also accidentally assign a footprint that doesn’t have the same number of pins as your schematic symbol. If your import is unable to complete, then you will have to find the problem and start the process again.

One useful tool for finding an error is the lis file. When Layout performed the import, it generated a file called Elec424Tutorial.lis in your board directory. Open this file in a text editor like Notepad to see what it looks like. This file will tell you everything that occurred during the import: what footprints were added or deleted, what components were added or deleted, and what nets were added or deleted (you will see later how footprints, components and nets get deleted). If an error occurred, you will see it here, probably towards the end of the file.

Getting around&Placing parts

All of your parts from schematics should be line up on the left side of the board. Before we start placing them, let’s do a few things to make our job a little easier. First, turn off DRC (Design Rule Checking).

We will use it later when routing, but not now. When you do this, the box with the dashed line border will disappear. Second, I like to turn off a few layers at this point, just to make the screen a little easier to look at. You will notice a drop down box with the TOP layer listed. This box lets you select the active layer.

Layout has many shortcut keys to help you move around the program. They are extremely useful, and I encourage you to be familiar with them. For a complete description, search the help file for keyboard shortcuts .

Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, High-speed and embedded systems design (under construction). OpenStax CNX. Feb 18, 2004 Download for free at http://cnx.org/content/col10212/1.12
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