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Export the properties of your design again and fill in the information for each part. To help you, I have put an Excel version of the BOM in the following location on Owlnet.


When you have finished editing the properties, save the file and import them into Capture just like you did for the footprints.

Now you are ready to have OrCAD generate a BOM for you. To do this, highlight the design file in the file view of the project explorer. Select Tools--> Bill of Materials… to bring up the Bill of Materials dialog.

You will want to change a few of the default settings. Cut and paste the following text into the Header and Combined Property String fields of the dialog box.



Then click OK to generate the file. This should put a file called Elec424Tutorial.bom in your sch directory. This will be a tab-delimited file just like when you exported the design properties. You can use Excel or another program to make it look a little more readable. Do thisand put the finished version into the assy directory. This is one of the files that you will give to the assembler when you are ready to have your boards assembled.

Creating a board template file

You are almost ready to export your schematic design to Layout. Before doing this, we must create a board template file. This file defines some default properties for the board that will be used throughout layout. To create a template, start Layout and select File-->New . When you see the dialog, press Cancel . You should now see a blank workspace. You can use the same shortcut keys that you used in Capture to zoom and center the design (‘ I ’, ‘ O ’, and ‘ C ’).

The first thing we need to do is draw a board outline to define the perimeter of the board. For this PCB, we will make the board 3 inches by 2 inches. The board outline is an obstacle like the ones you placed in the footprint editor. To create the board outline, select the Obstacle Tool , right-click and choose New… and then right-click again and select Properties… Name the obstacle BOARD_OUTLINE , its type should be Board Outline , its Width should be 50 (mils) and it should be placed on the Global Layer . Place the first corner of the board at 0,0 and then draw from there. While drawing, you can use the information in the status bar to tell you where in the workspace you are. When finished, your board outline should look likethis.

Next, you will edit the layer stackup. Layout has spreadsheets just like the Library Manager does. Click the View Spreadsheet icon and select Layers . This spreadsheet defines all the layers that your board uses and their respective functions in the design. You will see a spreadsheet that looks something like this.

You are making a 4-layer board, so we will turn off some of the pre-defined layers because we will not use them. Double-click the INNER1 layer to bring up the Edit Layer dialog.

Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
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
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
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.
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
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
characteristics of micro business
for teaching engĺish at school how nano technology help us
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
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
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.
what is the actual application of fullerenes nowadays?
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.
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.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
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.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
Got questions? Join the online conversation and get instant answers!
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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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