德国达姆施塔特技术大学的研究人员不久前研制出一种微型扬声器,嵌在硅芯片中,可以把声音直接转换成光信号而不必通过中间电极。可以将它作为芯片的一个信号处理电子元件大规模生产,造价低廉;它适用于光链路通信。 这种微型扬声器有一块1平方毫米大小、仅1微米厚的膜片,贴附在一个有5微米深贯通细槽的部件上,这道细槽以及膜片的底面覆盖一层金,起镜子的作用,引导光信号通过这一装置。当声波冲击膜片时,膜片发生振动,振动则会改变沿踱金层 Researchers at the Technical University of Darmstadt in Germany recently developed a miniature speaker embedded in a silicon chip that converts sound directly into light without having to pass through the middle electrode. It can be mass-produced as a signal processing electronics chip at a low cost; it is suitable for optical link communications. This miniature loudspeaker has a 1 mm square diaphragm of only 1 micron thick, attached to a 5 micron deep through slotted part, which is covered with a gold coating on the bottom of the slot and diaphragm, The role of guiding the optical signal through this device. When the sound waves impact the diaphragm, the diaphragm vibrates and the vibration changes along the gold layer