Abstract: A musical feeding bottle for babies comprises a hollow body 10 for holding the baby's feed and a sound generating assembly having an electrically operated sound generating device 11,12 sealingly mounted therein. The sound generating device 11,12 is activated when the amount of light incident on a photodiode thereof exceeds a predetermined level. A shutter 21 is provided for obscuring light from the photodiode, when it is desired to deactivate the sound generating device 11,12. The shutter enables the device 11,12 to be activated and deactivated simply and remotely, without any physical connection to the device that could allow the ingress of liquid or steam liquid when the device is being washed or sterilised.

Abstract: Semiconductor integrated circuit processing is facilitated by an etch process illustratively applied to polysilicon and silicon nitride removal. The etch process illustratively comprises of the use of phosphoric acid with metal-containing additives to bring about an enhanced silicon etch rate effect.

Abstract: A method for forming v-shaped grooves in a substrate such as a channel plate is disclosed. A mask of silicon nitride formed by a thermal nitridation process protects the substrate during KOH etching.