浅谈摄像头AA制程

1、浅谈摄像头AA制程所谓AA制程，即Active Alignment ，解释为中文即主动对准，是一项确定零配件装配过程中相对位置的技在摄像头封装过程中，涉及到图像传感器、镜座、马达、镜头、线路板等零配件的多次组装，传统的封装设 备如CSP及COB等，均是根据设备调节的参数进行零配件的移动装配的，因此零配件的叠加公差越来越大，最终 表现在摄像头上的效果是拍照画面最清晰位置可能偏离画面中心、四角的清晰度不均匀等。而AA制程的设备在组装每一个零配件时，设备将检测被组装的半成品，并根据被组装半成品的实际情况主 动对准，然后将下一个零配件组装到位。这种主动对准技术可有效的减小整个模组的装配公差，有效的提升

2、摄像 头产品一致性，也为更高阶的摄像头产品封装创造可能性。在图像传感器的分辨率不断增加和单像素尺寸不断减小的情况下，镜头组装到传感器的相对定位的准确性要求越来越高，传统的封装设备已经不能满足。通过 AA制程主动校准技术，可调节镜头对准至 6个自由度（X，丫, Z，9 X，9 Y,及B z）。通过调节相对位置和镜头倾斜，可确保拍照画面中心最清晰，以及提升画面四角解像力 的均匀度，使产品一致性得到提升。当前看，光学防抖、超高像素、大光圈等产品须 AA制程主动对准机制才能较好的生产制造，而更多未来产 品或许需采用这类主动对准技术的设备和制程。 AA制程有望成为手机摄像头封装的新门槛，将高阶产品的封装

3、 制造置于AA的门槛之上。以下为示意图The Perfect, Theoretical, Camera Only Exists on Paperof sensorReal World Problem #1: Lens a nd Barrel Toleranceenter of sensorZ foe us heightDepth丁 rcKiisUeptr. fix nsLens 启nd barrel manufacturing tolerances cause problems.and t怜e edges of the sensor are outside the depth of focus

4、The lens1 optical path is aligned with the center of the sorThe sensor plane s orthogonal to the optical path. and i$ in the center of the depth of focusThe new optica! path is no longer centered on the sensor.,.Unfortunateiy. because of manufactunng tnlersnueM this theoretical camera requires expen

5、sive componenlsr and is difficult to manufactureResult: The tilt causes the image to be blurred in the comers, and the centration causes the pictbre to be cut off at the edgesA perfect camera, in theory.1Real World Problem #2: Lens Barrel and Sensor TolerancesSensor placement tolerances cause furthe

6、r problems1 focus.* -1center of sensorAdditional tilt or mis alignment of sensor makes the image worseCteDStl. ;低iFZ focus twig ikof sensorResult; len?, barref and sensor tote rances combine to produce low yields and lowperformance cameras. The problem increases with higher megapixel camerasSolution: Adaptive Active AHgnmentPower up sensor during assembly and align to 5 degrees of freedomApply uncured UV adhesiveResult: Aligning to optical rather than mechanical properties res