Differences

This shows you the differences between two versions of the page.

--- wire_bonder [2025/04/17 12:44] – [Common problems, tips and tricks] wigbout
+++ wire_bonder [2025/04/17 12:56] (current) – [Available accesoiries and tools] wigbout
@@ Line 33: / Line 33: @@
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-A detailed view of the wirebonder wedge (to scale) is shown below.
+A detailed view of the wirebonder wedge is shown below.
 {{ :wirebonder_wedge.png?nolink&1000 |}}
@@ Line 59: / Line 59: @@
    * :?: **Bonds are weak, they break easily.** \\ You might be flattening the wire too much: decrease Force!
-   * :?: **Bonds are set, but when moving to the loop height, they still break.** \\ Lower the Loop Height to about the same height as the 1st Search Height. Upon setting the first bond, slowly increase the Loop Height. If the bond still breaks when you do this very carefully, you might want to perform a reverse stepback-manoeuvre to make sure that the tension is not on the bond, but in a kink in the wire. You can find out how to do this [[here]]. FIXME
+   * :?: **Bonds are set, but when moving to the loop height, they still break.** \\ Lower the Loop Height to about the same height as the 1st Search Height. Upon setting the first bond, slowly increase the Loop Height. If the bond still breaks when you do this very carefully, you might want to perform a reverse stepback-manoeuvre to make sure that the tension is not on the bond, but in a kink in the wire. You can find out how to do this [[wire_bonder#Making nice bow bonds|here]].
    * :?: **None of these work?** \\ If changing the Time and Force doesn't work, try changing the Power. If the Power > 2, and it still is not working, the problem lies in your sample, not the wire bonder. Make sure that the sample is mounted rigidly, so that no resonance effects occur. Make sure that the sample is flat, so that the foot of the wedge is optimally touching the sample surface.
@@ Line 86: / Line 86: @@
 === Check the wedge and wire: ===
    * Check if the wedge is in the microscope's field of view at minimum magnification. Focus on the wedge tip.
-   * Check if a small tail of wire is visible. If not: [[feed manually]].((add internal link)) FIXME
+   * Check if a small tail of wire is visible. If not, [[wire_bonder#Feed small amount of wire|feed manually]].
    * Without touching the spool of the wire, check that the wire is not too tense. If the wire looks straight, carefully loosen the nut on the left. This makes sure that the spool can unwind.((If the wire is tense, and you are setting a bond, at some point, the clamp will open, and the wire will jump out of the needle. If you are lucky, it only jumps out of the small hole, but if you are unlucky, the wire jumps out of the needle completely, even unwinding at the spool. This typically means that we have to throw away several centimeters of wire.))
 === Check the ultrasound transfer: ===
-   * Check if the wedge is installed correctly. With the test button on the left panel you can check if the wedge is installed properly in the US transducer. Push the button down, the 'U/S' LED should light up continuously. If bonding doesn't work make sure you check the US transducer again. If not: [[adjust the wedge height]]. FIXME
+   * Check if the wedge is installed correctly. With the test button on the left panel you can check if the wedge is installed properly in the US transducer. Push the button down, the 'U/S' LED should light up continuously. If bonding doesn't work make sure you check the US transducer again. If not, [[wire_bonder#How to adjust the wedge height|adjust the wedge height]].
 === Check wire bonder settings: ===
@@ Line 148: / Line 148: @@
   * Close clamp
   * Move clamp lifter down
-  *
+If you can see that the wire is not going through the lower hole, but instead, is curling up, this could mean that the wedge is clogged. [[wire_bonder#How to clean the wedge|here you see how to fix that]].
 {{ :wiki:wirebond_bow.jpg?nolink&200|}}
@@ Line 161: / Line 163: @@
 On the left panel use the 'TEST' switch, the U/S LED between the 1st and 2nd should light up continuously.
 \\When loosening or tightening the screw of the wedge always make sure to use the correct height gauge! The height setting of the wedge is extremely sensitive.
+=== How to adjust the wedge height ===
+FIXME
 === How to change the wedge ===
 FIXME
@@ Line 166: / Line 172: @@
 === How to clean the wedge ===
-min in the ultrasonic bath in ISO-Propanol
+If the wedge is clogged, you might want to clean it.
+Find a small petridish and fill it with a bit of isopropanol. Hold the petridish underneath the wedge without spilling, and use the Test-switch to turn ultrasounds on. This way, we basically ultrasonicate the wedge as if it were in a ultrasonicator. Sometimes, 10 seconds is enough to clean the wedge. If it is still clogged, you might want to remove it. Please contact a technician before you do that.
-===== Available accesoiries and tools =====
-  * Heater control to heat up the sample holder to facilitate Au wire bonding, this can be connected to the sample holder.
-  * Gooseneck bifurcated light guide on top of the bonder
-==== Wedges, capillaries & wire types ====
-The following wedges and capillaries are available:
-  * W Wedge - VU45A-W-2025-3/4-CM - used for 25μm Al wire
-  * Ti Wedge - VU45A-TIB-2025-3/4-CM - used for 25μm Au-wire
-  * Wedge - 4WNLO-2025-W5C-MOO - used for 25μm Al-/Pt-wire
-  * Capillary - 40472-0010-324 - used for 25μm Au-/Pt-wire