Presentation on theme: "Bumm/OU NanoLab Assembling Your EL Lamp Cleaning the ITO Application of the phosphor layer Application of the dielectric layer Application of the back."— Presentation transcript:
Bumm/OU NanoLab Assembling Your EL Lamp Cleaning the ITO Application of the phosphor layer Application of the dielectric layer Application of the back electrode Testing the completed display This presentation will take you through the steps to assemble your electroluminescent lamp. The Luxprint Electroluminescent Inks were donated by DuPont. (www.mcm.dupont.com)(www.mcm.dupont.com)
Bumm/OU NanoLab ITO (green) Overview of the EL Lamp phosphor (cyan) dielectric (magenta) conductive rear electrode (gray) Copper tape electrodes (brown) The layer thicknesses are greatly exaggerated! etched electrode isolation bar. phosphor layer extends to edge of the isolation bar (left) to image border (right) to edges of slide (top & bottom) dielectric layer nearly covers the isolation bar (left) extends to image border (right) to edges of slide (top & bottom) Conductive rear electrode layer connects to electrode bar (left) does not extend to image border (right) does not extend to edges of slide (top & bottom) copper tape connects to the left (rear) electrode bar and to the right (front) electrode bar.
Bumm/OU NanoLab Cleaning the ITO First set up the basic mask pattern Set up PowerPoint for drawing from the draw menu select ‘Grid & Guides’ check ‘snap objects to grid’ select grid spacing of 0.063” (1/16”) check ‘Display grid on screen’ Define the area Use the rectangle tool to draw a 1” square. Make the fill black Select the square and use the ‘paint bucket’ Add the bar to separate the front and back electrodes. Using the rectangle tool make a rectangle taller than 1” and one grid unit wide. use the paint bucket tool to set the fill to white. We actually want the bar thinner. Select the bar and then right click. From the pop-up menu select ‘format auto shape’ select the ‘size’ tab and adjust the width to 0.03” (You will need to type this.)
Bumm/OU NanoLab Position the bar select the bar and move it 2 grid spaces from the left. The right edge of the bar should be 2 grid spaces from the left. The leading edge of the object snaps to the grid, so the result depends on the direction you are moving. We also need to reserve space for the front electrode. Our design must fit in between. Duplicate the bar and position the duplicate 2 grid spaces form the right. Completing the basic pattern Select the left bar set the line color (outline) to ‘no line’ Select the right bar, set its fill color to black Group all three objects select all three objects, right click, from the pop-up menu, select grouping, select group. The area for your pattern. Now you have the basic pattern created. You can now add patterns between the left and right bars. For aesthetic reasons you will want to leave a margin of at least one grid unit around your pattern grid spaces (1/8”) If the two bars do not appear to have the same width, This could be an artifact of the display. Zoom the display, at higher magnification they should appear equal. Area for your pattern Designing Your Etch Mask (steps 5-8)
Bumm/OU NanoLab Create a temporary guide It is useful to make a rectangle to define the pattern area. Add a rectangle to define your pattern area, shown in blue. Your will delete this later. Draw your pattern inside the rectangle. Make sure it is black & white. No gray. Remember the mask will define where acid will remove ITO Fixing isolated areas. The pattern we want, enclose regions of ITO which are not connected to the front electrode contact. We can easily fix this by drawing black lines between the outside and the inside. Use several lines to insure connection. Some may fail. Use lines at least 1-1/2 pts wide. Finalizing your pattern When you are satisfied with your pattern erase the guide rectangle from step 9. Group all of the objects. This helps prevent parts of your mask from accidentally shifting Designing Your Etch Mask (steps 9-12) What I have done is easier to see here
Bumm/OU NanoLab Final check Make sure the bar separating the front and the back electrode is clear. No part of your pattern should cross it. Are any parts of your pattern isolated? If so go to step 11. Because your pattern is only 1” square, you can put many on one sheet. It is a good idea to copy our mask pattern several times so that you have extra. Test print you mask on paper You will use a laser printer to generate your mask by printing onto transparency film. Because transparency film does not grow on trees we will first make a test print on paper. It is best to perform the test print on the SAME printer you will use for the transparency. Print your mask on transparency film. Inspect you Finished Mask If you find defects in the black image use a Sharpie marker to cover the unwanted clear areas. When you are sissified with your mask your are ready for the photolithography Designing Your Etch Mask (steps 13-16) PowerPoint wants to print white lines as black. To print what you see, go to ‘print’ from the ‘file’ menu, at the lower left under ‘print what’ select ‘color’