An ion-sensitive FET sensor has a MOSFET gate isolating membrane (13) whose surface is covered by an ion-sensitive layer (17). A redox layer (16) having a redox function is provided between the isolating membrane (14) and the ion-sensitive layer (17) to improve operating stability and speed of response. An electrically conductive layer or a combination of a thin metal film and an electrically conductive layer may be provided between the isolating membrane (14) and the redox layer (16) to further improve operating stabiality, the adhesion of the layers and the durability of the sensor. Also disclosed are optimum materials for use as an ion carrier employed in the ion-sensitive layer.
                            离子敏感场效应晶体管传感器有一个 MOSFET 栅极隔离膜 (13),其表面覆盖有离子敏感层 (17)。在隔离膜 (14) 和离子敏感层 (17) 之间有一个具有氧化还原功能的氧化还原层 (16),以提高工作稳定性和响应速度。在隔离膜(14)和氧化还原层(16)之间可设置导电层或
金属薄膜和导电层的组合,以进一步提高操作稳定性、层的附着力和传感器的耐用性。此外,还公开了用作离子敏感层中离子载体的最佳材料。