自動光學檢測技術的應用與發(fā)展ppt課件

1、自動光學檢測技術的應用與發(fā)展 Automated Optical Inspection2AOI是什麼?Automated Optical Inspection自動光學檢查機普通區(qū)分為：COLOR CCD CAMERAB/W CCD CAMERA3AOI可以做什麼?外觀檢查PCB製造業(yè)電子加工業(yè)半導體產(chǎn)業(yè)汽車燈泡內(nèi)殼零組件生產(chǎn)其他4AOI and Electrical Test Are Best Used TogetherLow solderUnwetted pinsMissing bypass capsSkewed / misplaceddevicesBillboarded devicesOp

2、en power orparallel pinsSurface defectsAOIAOIDoes not require a test fixtureEasily applied to partially-builtboards.Direct soldering processfeedback.Improved process monitoring bydetecting defects earlier.Applies board powerTests component function, toleranceand possibly board functionCan test hidde

3、n featuresWrong devicesMisoriented device (cap,diode)Device programming(flash ROM)Device defects (e.g.cracked, IC)BGA and other hiddenpinsBasic device functionElectrical testElectrical testLifted leadsTombstonedMissing deviceMisoriented IcsBillboardedOpen power or parallel pinsSurface defects5AOI的檢查

4、原理VerticalLightDifference LightHorizontal LightAOI的檢查原理Red or whitemono lightingColor lighting with independent light zonesColor lighting is veryeffective for backgroundimage noise eliminationAOI的檢查光源In-line AOI - TR7500TR7500- Max. board size : 510*460 mm Resolution : 10, 15, 20, 25 um (14 sec M-si

5、ze PCB, excluding fiducial mark finding and loading time)- Camera : 1 top XGA 3CCD camera (1024x768) 4 angle XGA Mono camera (1024x768)- Lighting System : RGB + White LEDX-Y table: 1um resolutionZ Axis: 1um resolution (Option)- Min. Chip size : 01005Repair Station (Option) and Shop Floor Control Win

6、dows 2000/XPEthernetRepair stationShop floor systemSPCSix Sigma硬體: 1. 3-CCD的真彩鏡頭. 2. 環(huán)光燈盤. 軟體: 1. Phase & Weighting 2. 白平衡影像的強化. 3. HSI影像補償. 4. 錫型檢測 .無鉛製程的檢測挑戰(zhàn)與解決方案IPC-A-610D, Feb/2005IPC-A-610DTin/Lead vs Lead free3CCD成像與1CCD成像的差異3CCD可以用三原色的取相(PHASE)方式賦予不同的權重加以堆疊,進而強化所需檢測的物件影像.以1CCD的取相方式較無法明晰的顯現(xiàn)主體,

7、且無法強化或凸顯所檢測的待測物.被測影像往往在放大之後會呈現(xiàn)出馬賽克影像.檢測圖像模糊不清,檢測員複判困難1 CCD or 3 CCDLess data for colorColor enhance is difficultImage quality is poor CCD (Charge Couple Device) structure1 CCD Structure3 CCD Digital Technology3 CCD type camera have3 different CCD to receiveDifferent color.Color Phase Weighting Effec

8、tColor/Mono Image example環(huán)光光盤的錫型檢測原理錫型檢測方法鋼珠：白光鋼珠：環(huán)光斜率轉(zhuǎn)換錫型分析InsufficientsolderNormalExcessiveSolderSolder Fillet Reconstruction彩色影像處理White Balance HSI Color Transfer &Phase Effect White Balance 白平衡目的 物體在不同光源的照射下，顏色就會不同。比好像樣是一張白紙，在大太陽、日光燈、電燈泡底下，因色溫的不同就會呈現(xiàn)不同的顏色。 白平衡簡單的說，就是讓白的拍出來像白的。 LED光源打光時因色溫會偏藍，因此可針對打勻均光源時做白平衡，將紅、綠顏色做補償。現(xiàn)階段已應用於擷取電路板全圖的光源上(MapLight)。白平衡比較HSI 彩色模型Hue，色度 代表顏色的種類。Saturation，飽和度 代表顏色中含有白色成分的多寡，即顏色的純淨程度，也就是白色中混入其它種顏色的比例。Intensity，亮度 代表從黑到白之亮度變化。指顏色所引起人類對明暗程度的感覺。 HSI Color Transfer目的 透過RGB彩色模型轉(zhuǎn)換到HSI彩色模型，由色調(diào)(H)、飽和度(S)、