Phosphorescent Electronics Case Study

A leading manufacturer of oxygen concentrators and delivery equipment needed design and development assistance for a membrane switch used in a medical device product. The switch needed to be visible in low light environments. JN White® developed a custom part with glow-in-the-dark graphics created using phosphorescent technology while also incorporating other common features medical equipment manufactures need for long-term durability, chemical resistance and liquid ingress.


The customer approached JN White® for help designing and producing a membrane switch for a portable oxygen unit. The product was utilized in low light environments and the customer needed a solution with graphics that would be easy to see in these situations. In addition, the switch needed to be sealed to meet stringent medical device guidelines.

How JN White® Helped

After initially manufacturing prototypes with white graphics, the customer wanted more visibility in low light environments. The design team at JN White® quickly developed a solution to the visibility challenge by proposing glow-in-the-dark graphics. This graphics treatment was achieved using phosphorescent technology. In addition the team designed the switch with a “solid” polycarbonate gasket that met the “ingress” requirements without going the route of expensive 3M VHB tape.


The team at JN White® managed the development of this component from inception through production. The final switch is sealed to meet the product requirements and utilizes phosphorescent technology for glow-in-the-dark graphics. The switch can easily be seen in even low light environments.

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