not at all, no, but their sensor division has fallen asleep since years back
Sorry, I wasn't aware that Canon sold sensors. I thought they sold cameras.
there is a small detail inside the cameras called sensor, earlier it was something called film
Did Canon make film? Obviously, dSLRs contain sensors.
My point is that a naked sensor does a very bad job of capturing and storing an image. Things like a viewfinder, autofocus system, mirror/shutter assembly, processor(s), etc., are important parts of the product. The sensor is not the product, and to focus exclusively on the sensor and by extension, imply that the rest of the camera is of no more importance than the cardboard box used to package the camera, is ridiculous. You take pictures, right? Disassemble your camera and remove the sensor, then take that sensor out into the Finnish countryside and shoot some pictures. Let us know how that works out for you.
R&D yen are finite, not infinite. A company must decide how best (for them) to allocate those yen. Look at car manufacturers - comparing models over time, despite a new model coming out each year, not everything about that new model is updated each cycle. Last year saw the model updated with a continuously variable transmission, but the engine was the same. This year, the body style may be updated. Next year, maybe a new suspension and quad-zone climate control. The engine won't be updated until the 2015 model comes out.
Your suggestion that their sensor division has 'fallen asleep' needs to be put into the context of an overall product development strategy, or you fall into the trap of assuming that the thing that's most important to you is important to all consumers. We're all aware that there is a vocal group of individuals who are dissatisfied with Canon sensors, particularly with their DR when compared to Nikon. Fine. In the past couple of years, there has been a shift away from megapixels in marketing and popular view - I've frequently read that, "ISO is the new megapixles," and statements to that effect. Maybe someday, DR will be the new ISO. BUt we're not there yet. The market shows that the vocal group complaining about comparatively poor DR of Canon sensors is a small minority (as evinced by the fact that Canon sensors have trailed
Nikon sensors on DR for a few years, years in which Nikon lost market share to Canon).
Looking at sales performance over time, Canon was the market leader a few years ago, and remains the market leader. For most of quarters in the last few years, they have gained market share, not lost it - despite being 'asleep' in terms of sensor progress. That says to me, and quite likely to Canon as well, that their strategy has been successful. Most of their recent models, at the higher end at least, have offered minor improvements in sensor IQ, coupled with major improvements in performance (AF, frame rate, etc.).