A study has been made to find an effective method for recycling DVD-R using a pulsed electric discharge. Pretreatment to expose a metal layer is required for DVD-R because the metal layer is sandwiched by two polycarbonate plates, different from other optical discs such as CD-R/ROM. In this study, a DVD-R was manually separated into two pieces from the boundary between the metal and recording layers. Moreover, the electrode arrangement should be modified to effectively generate a discharge because the pretreated disc has an exposed metal surface. For this purpose, an out-sided and center electrode (OCE) arrangement with an air gap between the electrodes and metal layer was employed. The progress of metal removal was measured for the different air gap length. The influence of the air gap was discussed based on the observation of the voltage/current waveforms and the state of discharge and metal removal. As a result, it was revealed that 100% removal could not be achieved in the case of the electrode arrangement without an air gap. On the other hand, it was revealed that the processing rate decreased as increased of the air gap between the metal layer and the electrode. An air gap of about 3 mm was effective for DVD-R recycling.

已经进行了研究以找到一种使用脉冲放电来再循环DVD-R的有效方法。DVD-R需要进行预处理以暴露金属层，因为金属层被两个聚碳酸酯板夹在中间，这与其他光盘（例如CD-R / ROM）不同。在这项研究中，将DVD-R从金属层和记录层之间的边界手动分成两部分。而且，由于预处理的盘具有暴露的金属表面，因此应该修改电极布置以有效地产生放电。为此，采用在电极和金属层之间具有气隙的外侧和中心电极（OCE）布置。对于不同的气隙长度，测量了金属去除的进度。在观察电压/电流波形以及放电和金属去除状态的基础上，讨论了气隙的影响。结果表明，在没有气隙的电极装置的情况下不能实现100％的去除。另一方面，可知随着金属层与电极之间的气隙的增加，加工速度降低。大约3 mm的气隙对于DVD-R回收有效。