Applications

Applications

The number of applications for thermopile- based infrared sensors are extensive. In this section we have listed some of the applications where JonDeTech’s sensor can add great value due to its nanotechnology features. Among the main advantages are design flexibility, simplicity and cost effectiveness catered for mass market production. This allows for unprecedented usage areas and design possibilities, e.g., integration into smart devices where previous generations of IR sensors are too big, too fragile or too slow.

Once fitted onto a flexible PCB carrier it can be fitted, mounted or glued to most surface materials. The sensor is robust and can be used without any protective housing. With proper design it can be mounted directly onto walls or glued to machine parts, etc.

Applications:

Presence and absence detection: Lap top
JonDeTech’s IR sensor works perfect in a presence/absence application. Due to its properties it can be used standalone without encapsulation, which makes it fit into even the narrowest bezels. Combining the size-made-to-fit attribute with an internally developed driver – that takes the raw non-calibrated IR signal and detect presence and absence – makes the solution extremely cost- and size effective.

Contactless temp measurement
JonDeTech IR sensor has the ability to measure temperature on a surface without being in contact with the object. This enable a fast and accurate measurement in products like ear thermometers, small handheld devices such mobile phones and temperature surveillance inside buildings and offices.

Temperature surveillance inside products
JonDeTech IR sensor is very thin and robust, therefore it’s possible to use it without encapsulation inside products to measure and monitor temperature on for example product casing/housing, batteries or other heat sensitive electronics.

Car heat surveillance
This is an extension of the lap top application and can detect “life” inside of a closed car, parked in the sun, before the heat is rising to deadly temperatures.

Contactless temp measurement – Comfort temperature
Today we measure air temperature, however the air is heated by the objects in it. By measuring the “comfort temperature” – taking radiation from walls, desks and other objects, into consideration when we measure the temperature, we can better predict whether the temperature in an area will rise or decrease before it does. This application can be used in IoT and automotive application as well as in mobile phones.

The JonDeTech Difference

The thermopile leads can be arranged in different manners; for most commercial sensors of today, typically, horizontal or “in-the-plane” architecture is used. The reason for this is strictly process related. Microelectronic processes have historically been developed to make lateral structures on silicon wafers. However, this is not always the best sensor solution since the hot and the cold junctions are placed next to each other on the same surface. To use this as an infrared sensor an aperture must be integrated with the thermopile so that the heat radiation strikes only a limited area, i.e. the hot junction of the sensor. In other words, the full surface of horizontally configured thermopiles
can’t be used, neither can true “contact mode” be utilized.

The advantage of the vertical thermocouple lead arrangement (perpendicular to plane configuration) is that the hot and cold junctions are separated by the thickness of the substrate–the heat gradient is through the substrate. The object measured can be close to the sensor or actually come in contact with the sensor.

Vertical or “out-of-the-plane” configuration requires that the leads of the thermocouples are created through the substrate material, i.e. “via” interconnections are required. These vias have to be very small, which has been difficult to achieve previously. However, thanks to creative thinking and research at Uppsala University, an innovative idea with thermocouple lead-structures based on nanotechnology has been realized, which is what JonDeTech Sensors AB offers.

Production

The production is divided into almost a 100 subprocesses, of which a few are patented and made internally by JonDeTech. All of the other steps are made by third-party, ISO certified manufacturers, with standardized process protocols. With this set up every step of the process is quality assured and no investments in factories or production equipment are necessary. The production can be planned according to the market demand with minimal risk of volume variations over time.

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