Development of a large-area gas-microstrip detector using flexible substrates

使用柔性基板开发大面积气体微带探测器

• 批准号: 09640383
• 负责人: ODAKA Shigeru
• 金额: $ 1.98万
• 依托单位: High Energy Accelerator Research Organization
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09640383/
• 关键词: gas-microstrip; flexible substrate; FPC; ポリイミド基板; フォトリソグラフ; 超精密切削

The gas-microstrip detector is a candidate for low-cost particle-tracking devices to which a good two-track resolution (better than 1 mm) is required. In the future, it may take over drift chambers and proportional chambers being used in various fields, such as high-energy physics experiments. However, in order to realize this prospect, it is necessary to establish a technique for producing fine microstrip patterns on large-area substrates. The substrates are, in addition, desired to be flexible so as to fit to various detector shapes.In this research project, we have collected relevant technical information and, based on it, carried out some test fabrications, aiming at establishing such a technique. As a result, it has been confirmed that microstrip patterns having a width of 20 to 30 mum can be fabricated using the present technology for flexible print circuits (FPC). The fabricated test patterns have a sufficiently good uniformity, although developments should be continued concerning the overall accuracy of the pattern width.We used a relatively thick electrode material of 18 mum in thickness in the test fabrications. The sparking between anode and cathode strips is one of the most serious problems of gas-microstrip detectors. The use of thick electrodes is a promising solution for this problem. Most of the gas-microstrip detectors that have been developed so far employ very thin electrodes. Nobody has ever tried to use such thick electrodes comparable with ours. We have confirmed that we can fabricate sufficiently fine patterns even with such thick electrodes. This is the most remarkable result of the present research. We would like to proceed to a development aiming at practical detectors on the basis of this result, if we could be provided further financial supports.

气体微带探测器是低成本粒子跟踪设备的候选设备，要求具有良好的双轨分辨率(优于1 mm)。未来，它可能会取代用于高能物理实验等各个领域的漂移室和正比室。然而，为了实现这一前景，有必要建立一种在大面积衬底上制作精细微带图案的技术。在本研究项目中，我们收集了相关的技术资料，并在此基础上进行了一些测试制作，旨在建立一种这样的技术。结果，已经确认可以使用本技术用于柔性印刷电路(FPC)来制造宽度为20到30微米的微带图案。所制作的测试图案具有足够好的一致性，尽管在图案宽度的总体精度方面仍需继续开发。我们在测试制作中使用了厚度为18微米的相对较厚的电极材料。阳极与阴极板之间的火花是气体微带探测器最严重的问题之一。厚电极的使用是解决这一问题的一个很有前途的解决方案。到目前为止，大多数已经开发的气体微带探测器都采用了非常薄的电极。从来没有人尝试过使用如此厚的电极来与我们的电极相比。我们已经证实，即使用这么厚的电极，我们也可以制造出足够精细的图案。这是目前研究最显著的结果。如果能为我们提供进一步的资金支持，我们希望在这一结果的基础上着手开发实用的探测器。