Apple Applies for Patent on Fingerprint Sensor Packaging System

The U.S. Patent and Trademark Office today published an Apple patent application (via AppleInsider) filed in February of this year which addresses a system for packaging fingerprint sensors alongside conductive bezels in a single structure. The bezels deliver a small amount of electrical current to the user's finger, allowing the fingerprint to be read by the sensor.

The present disclosure is related to integrated circuit packaging, and more specifically to methods and apparatus for integrally molding a die and one or more bezel structures, with portions of each exposed or at most thinly covered, for fingerprint sensors and the like. [...]

Traditionally, the bezel and the encapsulated die have each been separate elements, brought together in the process of assembling or packaging the sensor apparatus. That is, the bezel and die are not encapsulated together.

upek_fingerprint_sensor_1

Fingerprint sensor package with sensor die (14/16) and conductive bezels (18)

The patent application goes on to describe some of the issues with previous fingerprint sensor assembly methods:

Current fingerprint sensor structures require a number of discrete assembly steps. As the number of discrete elements and manufacturing steps increase, manufacturing cost increases and the potential for faulty or inaccurate assembly that negatively affects product consistency and yield losses increase. Discrete element sub-assembly is also a more time consuming process than integrated manufacturing. As in the general art of IC production, there is significant, ongoing commercial pressure to reduce cost, number of components, and number and complexity of manufacturing steps, and size of the completed structure.

Furthermore, the separate bezel and encapsulated die structures are often undesirably large final devices. Further still, it is desired that the bezel be as physically close to the sensors as possible to optimize the sensitivity of the sensor.

upek_fingerprint_sensor_2

Cross section of finger on integrated sensor package

While the patent application was filed in February of this year, it actually appears to date much further back, as it is a continuation of a previous patent application filed in March 2010 and originally assigned to UPEK, Inc. That company was a 2004 spinoff of STMicroelectronics' fingerprint biometrics business. UPEK merged with AuthenTec in September 2010, and Apple ultimately gained the rights to the intellectual property when it acquired AuthenTec last year. Only one of the three inventors on the patent, Giovanni Gozzini, continues to work for Apple today.

Apple has been rumored to be adding a fingerprint sensor to its upcoming iPhone 5S as a differentiating feature compared to the iPhone 5. Rumors and speculation about Apple's interest in fingerprint sensor technology have been driven largely by its acquisition of Authentec, although evidence of the company's interest in fingerprint recognition dates back considerably further.

Tag: Patent

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Top Rated Comments

Jazwire Avatar
144 months ago
Given the latest government snooping news, not sure I want my fingerprints easily available.
Score: 15 Votes (Like | Disagree)
rjohnstone Avatar
144 months ago
oh boy! here we go with the whole "Apple is just copying" thing again
Oh boy, here we go with getting defensive about seeing facts!
Seriously... grow up. :rolleyes:

Yes... in this instance, Apple is copying a feature that has been used on a mobile phone before.

Let's just hope their implementation is better or it will disappear just as fast as the one on the Atrix did.
Motorola dropped the feature on the Atrix 2.
Score: 11 Votes (Like | Disagree)
SPUY767 Avatar
144 months ago
In 2 years when everyone is doing fingerprint scanners like this, it will suddenly have been obvious.
Score: 10 Votes (Like | Disagree)
kenwk Avatar
144 months ago
Given the latest government snooping news, not sure I want my fingerprints easily available.

LOL, I am pretty sure the government already has most ppl’s finger print already.
Score: 9 Votes (Like | Disagree)
ChrisA Avatar
144 months ago
Given the latest government snooping news, not sure I want my fingerprints easily available.

Don't worry. Fingerprint sensors don't store finger prints. Just like Mac OS X does not store your password. In both cases the data are "hashed" and only the hash is saved. If some one looks at a hash they can not know the password or finger print.

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I realise this is a long shot, but please make it happen in the 5S.

Entering the passcode may be a first world problem but it is nevertheless tedious. The more of a rush I'm in, the more likely I am to get the darn thing wrong.


I bet you will see this technology on door handles too. Keys are a hassel to cary around. Why not program the doors on your door and house to only open for the "right" people. No "swipe" the entire part of the handle where you grab it could be a sensor.
Score: 7 Votes (Like | Disagree)
rjohnstone Avatar
144 months ago
In 2 years when everyone is doing fingerprint scanners like this, it will suddenly have been obvious.
Motorola did it two years ago on the Atrix. ;)
Nice feature, just poor location of the sensor. (it was integrated into the power button)

Score: 5 Votes (Like | Disagree)