Ergonomic graphical user interfaces for displaying medical record information obtained from various sources within handheld devices are provided. The barrier layer has a moisture vapor transfer rate of less than 10\u22122 gm2 per day and consists of a multilayer of at least two thin hydrogenated silicon nitride layers having alternately lower and higher densities. A common source contact region having a second conductive type is configured in a second active region, which is configured between the two first active regions. The portion is located within the rear field of vision.