초록 ▼

A method for monitoring a gas leakage rate from a hermetically sealed device, such as a hermetically sealed data storage device with an interior helium atmosphere. In some embodiments, a diffusion rate of inert gas from a hermetically sealed first device is monitored until steady state diffusion is

A method for monitoring a gas leakage rate from a hermetically sealed device, such as a hermetically sealed data storage device with an interior helium atmosphere. In some embodiments, a diffusion rate of inert gas from a hermetically sealed first device is monitored until steady state diffusion is reached, and a standard time constant for the first device is identified. Next, the diffusion rate is monitored for a second sealed device for a portion of the time required for the first device to achieve steady state diffusion, and the time required for the second device to reach steady state diffusion using the standard time constant is calculated.

대표청구항 ▼

What is claimed is: 1. A method comprising:monitoring a diffusion rate of inert gas that diffuses from a hermetically sealed first device and through an inert gas permeable membrane adjacent the first device until a steady state diffusion rate is achieved;identifying a standard time constant for the

What is claimed is: 1. A method comprising:monitoring a diffusion rate of inert gas that diffuses from a hermetically sealed first device and through an inert gas permeable membrane adjacent the first device until a steady state diffusion rate is achieved;identifying a standard time constant for the first device to reach the steady state diffusion rate;monitoring a diffusion rate of inert gas that diffuses from a hermetically sealed second device and through an inert gas permeable membrane adjacent the second device for a portion of the time required for the first device to achieve the steady state diffusion rate; andcalculating the time required for the second device to reach steady state diffusion using the standard time constant.