Dry Film Photoresist-Based Microfabrication: A New Method to Fabricate Millimeter-Wave Waveguide Components

This paper presents a novel fabrication method based on dry film photoresists to realize waveguides and waveguide-based passive components operating at the millimeter-wave frequency (30–300 GHz). We demonstrate that the proposed fabrication method has a high potential as an alternative to other microfabrication technologies, such as silicon-based and SU8-based micromachining for realizing millimeter-wave waveguide components. Along with the nearly identical transfer of geometrical structures, the dry film photoresist offers other advantages such as fewer processing steps, lower production cost, and shorter prototyping time over the conventional micromachining technologies. To demonstrate the feasibility of the fabrication process, we use SUEX dry film to fabricate a ridge gap waveguide resonator. The resonator is designed to exhibit two resonances at 234.6 and 284 GHz. The measured attenuation at 234 GHz is 0.032 dB/mm and at 283 GHz is 0.033 dB/mm for the fabricated prototype. A comparative study among different existing technologies indicates that the reported method can give a better unloaded Q-value than other conventional processes. The measured unloaded Q-values are in good agreement with the simulated unloaded Q-values. The signal attenuation indicates that SUEX dry film photoresists can be used to fabricate passive devices operating at millimeter-wave frequencies. Moreover, this new fabrication method can offer fast and low-cost prototyping.

DRY FILM PHOTORESIST APPLICATION TO A PRINTED CIRCUIT BOARD (PCB) USING A MASKLESS PHOTOLITHOGRAPHY METHOD

This paper offers an alternative method of making PCB routing using a negative dry film photoresist and a maskless photolithography method. The objective of this research is to determine the correct parameters for the process of making PCB design easier, cheaper and safer.Electronic circuit design was created on a laptop or PC using Autodesk EAGLE software with a combination of result is black and blue light color. PCB routing design was inserted into a PowerPoint slide to display on a commercial Digital Light Processing (DLP) projector. Nomodifications were made to a projector, which was mounted directly on a stand with a downwardfacing position. The projector lamp replaced an ultraviolet or X-ray source during the exposureprocess, exposing PCB coated in negative dry film photoresist. After the exposure process, the PCB was inserted into the developer solution, causing the blue light irradiated part to remain while the blackened sections dissolved. The PCB was then added to an etching solution to scrape the copper unprotected by the photoresist. The PCB was finally soaked in a remover solution to remove the photoresist. Once complete, the process generated a laptop-designed PCB routing. Electrical lines can be created using this method with a size of 100 µm and a lane edge deviation of 5 µm. The goal of research to make PCB routing cheaper, easier and safer was achieved. Evidenced by the installation of electronic components and then tested, the results are all components function well.

PELATIHAN PEMBUATAN LAYOUT PCB DENGAN DIP TRACE DAN DRY FILM PHOTORESIST BAGI SMK MUHAMMADIYAH 2 SALAM MAGELANG

The desire of students of SMK Muhammadiyah 2 Salam Magelang to be able to make a printed circuit board is something that is very important to be welcomed and followed up wisely so that the desire of the students is not just a wishful dream but will be a reality. This activity is meant to be an effort not only to overcome difficulties at certain times (short-term activities), but is expected to be sustainable for the future (longer term). Looking at the fact, of course, should be strived to realize the handling of the problem at least for the near term. For that required activities that are practical and immediate benefits can be taken as the activity can be a short course or short training. To solve the problem, it is realized by holding a short course / training course on PCB Layout Creation with DIP TRACE and Dry Film Photoresist technology followed by etching process, drilling and installation of components that will be useful for students who want to do the main final work related with the manufacture of tools / hardware. Keywords: Making PCB, DIP TRACE, Dry Photoresist film