Design Process of Serpentine Channel

1

• Design Process of Serpentine Channel
• Documentation on the design of a basic
• injector-separation channel model design

2
Design that will be build

• A generic design representative of a class of
  separation systems
• space constraints require the use of efficient
  channel folding
• Simple two-device system a double-T injector
  followed by a two-turn serpentine separation
  channel
• Injector operates with a low amount of pinching
  and pullback for the loading and dispensing
  stages, respectively
• Separation occurs over a length slightly more
  than 1/2cm
• Relatively short separation length because the
  species are easily separated
• Mobilities are 40k um2/Vs and 50k um2/Vs
• Diffusivities are 400um2/s and 400 um2/s

3
Final Design Flow Direction
This is the electric field flow direction
4
Creating a new Library

• Go back to the Library Manager window
• Clicking on toolbar menu File -gt New -gt
  Library... will open a New Library window
• Enter the Name of the new library you would like
  to add and press OK
• Your library would be created in the directory
  where you started Cadence (the SYNBIOSYS_Cadence
  folder in your work directory)

5
Back to the Library Manager

• Now you will see your library (in this example,
  Test) that was just created in the column labeled
  Library
• A Technology File for New Library window pops
  up
• check the Dont need a techfile box and click OK

6
New Cellview

• To create the new cellview, click the library you
  just created, click on toolbar menu File -gt New
  -gt Cell View...
• A Create New File window will appear
• In this window the Cell Name, View Name and the
  Tool of your design are set
• Give an appropriate name for Cell Name
• In Tool select Composer-Schematic and click OK

7
The Editor Window

• A Virtuoso Schematic Editing window appears

This window is where the components of the demo
design will be assembled and connected
8
Adding an Instance

• There are three different ways to insert an
  Object as an Instance
• One way to do this is to go in the toolbar menu
• Add-gtInstance i
• Another is to use
• the hotkeyi
• And the third is
• to use the button
• on the side
• toolbar

9
Selecting the Object

• Once you have used one of the ways to instantiate
  an Object, a window will appear named Add
  Instance
• You will need to input the desired object and its
  respective properties
• These can both be done by clicking Browse next to
  the Library text box, a new Component Browser
  window will appear where we can choose the
  library and the component
• Click on the drop down tab for Library and select
  NODAS_FLUID
• Choose the INJ_doubleT from the list that appears
• Click the Hide button and get back to the
  Virtuoso Schematic Editing window

10
Placing the Instance

• Click anywhere in the Editor window to place the
  instance
• The position where you place the instance is not
  permanent, the instance can be moved by selecting
  it and dragging it into its desired location

11
Editing Properties

• In the Editor window, click on the object you
  just placed
• A white outline appears around the object
• Click on the button shown below on the side
  toolbar
• The Edit Object Properties window appears
• To get to the properties of this object click on
  the drop-down tab for CDF Parameter of view and
  select veriloga, and input all of the appropriate
  fields as seen in the image

12
Separation Channel I

• Now another object needs to be added, Go to Add
  -gt Instance i
• When the Add Instance window appears this
  time, follow the same process as adding the
  previous instance and enter the following data in
  the appropriate fields
• The SEP_channel is a straight separation channel
  for the flow of the different species
• The L (length) parameter
• larger the value of L, more is the separation
  between the species for fixed voltage and
  mobilities
• Once the properties have been entered, place the
  new object in the Editor with the inputs of the
  new SEP_ channel aligned with the separation
  output of the INJ_doubleT (The side with 5
  outputs, or square blocks)

Library Cell Properties
NODAS_FLUID SEP_channel L 3000 W 50 sp_Mu_0 mu0 sp_Mu_1 mu1 sp_D_0 D0 sp_D_1 D1 H 10
13
Wiring

• The two components need to be connected through
  wires
• There are again three ways to select the wire
  tool
• One way is to go into the toolbar menu
• Add-gtWire (narrow) w
• Another is to use
• the hotkey w
• And the third is
• to use the button
• shown below
• on the side
• toolbar

14
Wiring Part 2

• Once the wiring tool has been selected, the wire
  needs to be laid down
• To connect the two components simply click on a
  pin on the output of the injector and then click
  on the corresponding pin input of the channel and
  those two pins are wired up
• Repeat this process for the rest of the pins as
  shown in the picture

15
Another Way to Wire

• There is another way to wire two elements
  together
• That way is to simply place the instances such
  that the pins that are going to connected are on
  top of one another and then move the instances
  apart
• This process will quickly and easily connect two
  components together
• This method will be used for wiring for the rest
  of this tutorial

16
The Detector

• Instantiate a new object with the following
  properties

Library Cell
NODAS_FLUID SEP_detector sp_Mu_0 mu0, sp_Mu_1 mu1, sp_D_0 D0, sp_D_1 D1

• Once the detector has been placed in the Editor
  window, wire it to the channel as shown
• The detector is placed at different stages in the
  separation channel to monitor the flow of the
  species

17
Adding Pins

• The next item that need to be added are pins so
  that the design can interact with the outside
  environment
• There are three ways to add pins
• One way it to go into the toolbar menu
• Add -gt Pin... p
• Another is using the hotkey p
• And the third is use the button as shown below on
  the side toolbar

18
Pins Part 1

• By using one of the previous buttons, or hotkey,
  the Add Pin window will appear

• Enter the Pin Names exactly as is shown
• Also make sure the Direction is set to output
  and all the check boxes shown are checked

19
Pins Part 2

• The next step is to place the pin on the Editor

20
Rotate Part 1

• The Pin is facing to the right
• To clean up the look, the pin can be rotated to
  be pointing straight down
• There are three ways to Rotate Items
• One way it to go into the toolbar menu
• Edit -gt Rotate r
• Another is using the hotkey r

21
Rotate Part 2

• Once the rotation process has be started, simply
  click on the object to rotate it
• Click multiple times on the object to rotate it
  multiple times

22
Adding the Wire

• Once the object has been rotated to the desired
  direction, it is then wired up to the detector as
  shown

23
Finishing Pins

• The last step is to repeat the process for
  another pin on the top of the detector
• The Pin Names for the new pin should be res, and
  its Direction should be set to output as well

24
Rest of the Design Components
Instance Number Cell Properties
1 SEP_Ubend1 L1 0, L2 0, W1 50, W2 50,R1 150, R2 200, sp_Mu_0 mu0, sp_Mu_1 mu1, sp_D_0 D0, sp_D_1 D1
2 SEP_channel L 2000,W 50, sp_Mu_0 mu0, sp_Mu_1 mu1, sp_D_0 D0, sp_D_1 D1
3 SEP_Ubend2 L1 0, L2 0, W1 50, W2 50,R1 150, R2 200, sp_Mu_0 mu0, sp_Mu_1 mu1, sp_D_0 D0, sp_D_1 D1
4 SEP_channel L 1000,W 50, sp_Mu_0 mu0, sp_Mu_1 mu1, sp_D_0 D0, sp_D_1 D1
5 SEP_detector sp_Mu_0 mu0, sp_Mu_1 mu1, sp_D_0 D0, sp_D_1 D1 Note Add Two Pins similar to the first detector, but named conc_outlt01gt and res_out respectively.
6 SEP_channel L 1000,W 50, sp_Mu_0 mu0, sp_Mu_1 mu1, sp_D_0 D0, sp_D_1 D1
7 WasteReservoir Vi V2LLOAD (1-LOAD)V2D, R 50, activated 1
Note These elements are in the Library
NODAS_FLUID.
25
After Adding The New Instances

• This is how your instances should be placed and
  connected

26
The Rest of Components for the Design
Injector channels 1,3 need to have the same
length4 is diametrically opposite 2 which is the
flow path of the separation channel as shown in
the next slide
Instance Number Cell Properties
8 SampleReservoir Vi V1LLOAD (1-LOAD)V1D, R 50, flag 1
9 SampleReservoir Vi V4LLOAD (1-LOAD)V4D, R 50, flag 1
10 SampleReservoir Vi V3LLOAD (1-LOAD)V3D, R 50, flag 1
11 INJ_channel (1) L 200, W 50, H 10
12 INJ_channel (4) L 100, W 50, H 10
13 INJ_channel (3) L 200, W 50, H 10
Note These elements are in the Library
NODAS_FLUID.
27
The Final Design
28
The Final Design Step

• The Last thing to do in the design phase is to
  save your design

29
Possible errors and warnings

• One possible warning that might arise is the
  occurrence of floating input or output pins
• This might be because of simple wiring errors can
  be corrected by zooming in on the warning points
  (highlighted yellow by Cadence) on the schematic
  and checking if the required points are indeed
  connected

30
Possible warnings and errors

• Check to make sure all the instances are properly
  oriented with other connections and instances in
  the system
• Incase they are not follow these steps
• Click on the misorientated (all instances need to
  look like ones shown in slide 39) instance and
  delete it
• Add a new instance and play with the Sideways and
  Rotate buttons to get the proper orientation of
  the instance
• Add the instance back on the schematic and
  connect it back to the other blocks
• If you notice convoluted wiring around instances,
  it is an indication that the instance is not
  oriented properly with respect to the other
  blocks

31
Things to note

• Make sure the mobilities and diffusivities
  denoted by variables mu1,mu0,D1,D0 are set in
  each instance
• This will be crucial to getting a proper output