he whole machine of mobile phone pursues more and more thin and light
In order to meet the endless thin and light requirements of smart terminals, mobile terminals such as mobile phones are becoming thinner and thinner. Taking Apple as an example, from ipone5's 7.6MM, it has already reached ipone6's 6.9MM. The domestic mobile phone is even more ultra-thin, and it constantly refreshes the thin and light record of the smart phone. Jinli S5.1 has just claimed the world's thinnest with 5.15mm thickness, OPPO R5 has done 4.85MM, vivo X5 thickness is 4.75MM. The amount of smartphones going down will be as thin as you can.

Smartphone pursuit of camera, 13M has become standard
Nowadays mobile phones are inseparable from taking pictures, and taking pictures has become an important function and selling point of smart phones. Moreover, with the advancement of technology and hardware upgrades, 13 million pixels or more have become the standard for mobile phones.
It can be said that the thickness of the camera has to a certain extent determined the thickness of the phone. Let's take a look at what changes have occurred to the 13M camera module in recent years. From the point of view of the module thickness, the thickness of 13M has been from 5MM or more, straight down to 3.7MM.

How is this done? This may be a problem for many customers and colleagues.
However, one manufacturer realized this dream with Samsung's 3M2+Largan lens + TDK or ALPS motor.

13M module can be how thin
We all know that several key factors that affect the thickness of a module, we look at what they can achieve the ultimate:
1, is the size of the chip; if the chip size is too large, the module is difficult to make thin. To ensure that there are enough pixel values and a single pixel of sufficient size, a 13-megapixel chip is also harder to do. For example, the 3M2 of the three stars is a 1/3.06 inch chip. Its current Pixel is 1.12 microns. Currently, chip manufacturers are developing a single Pixel chip of 1.0 micron. Thus, the chip area of the same pixel can be made smaller.
2. It is the TTL value of the lens; the current TTL value of the 13 million lens that can be mass-produced is 3.9MM. Under the same conditions of FNO, TTL Ratio is generally used to measure the difficulty of lens and processing. In general, 0.6 has reached the extreme point of lens design and processing, and has reached 0.7 or so. If you go further, it will greatly affect the quality of imaging.
3, is the height of the motor; the current mainstream is VCM focus motor. Now the open-loop center-mounted type is an important trend, and some manufacturers have already made the thickness of the motor to be less than 2.3 mm.
Based on the above aspects, with the existing technology, the 13M VCM autofocus module is close to the extreme at 3.7MM. If you go down again, it is not possible to use the existing mass production level. If other technologies appear, it may greatly reduce the height, such as MEMS or LCD motor technology, because it achieves different focusing principles, or can reduce the module height. But today these technologies are not yet mature.
The
Is the module image quality as thin as possible?
For this question, the answer is obviously no. From the point of view of the imaging effect and quality, the module is not as thin as possible. Because at design time, the emphasis on the ultimate ultra-thin, may affect its performance and effect. If the photosensitive chip material and technology are not improved, simply reducing the area will affect the imaging quality. Similarly, if the TTL value is too low, distortion may occur, and the center and surrounding image resolution may not meet the requirements. Similarly, the motor also has its own travel requirements. Facts have proved that manufacturers that have adopted the thinnest 13M camera module are also feedback. There are problems in the effect and quality of the 13 million camera modules that are as thin as 3.7MM. Even Apple, which pursues the perfection of its products, has to highlight its body in the choice of its iphone 6 product for the camera. A special commentator on "Eyes Online", a camera module expert Mr. L also told us that with the current technology and supply levels. The 13M camera is 4-4.5MM, and its performance can also be guaranteed. Below 4MM, it will affect and lose some of the performance and quality aspects.
Therefore, I also advise those friends who are working. For the camera module, you don't have to worry too much about its height. Otherwise, the wise man will have a lot of trouble.