Patent ID: 8346497

Claim:
A method for testing comprising: producing a digital image by taking a visible light dark field photograph of a semiconductor film, the semiconductor film having a crystallinity that has been improved by irradiating an energy beam, wherein a direction in which the energy beam has been scanned is a Y direction, and a direction perpendicular to the Y direction is an X direction in the digital image; defining a plurality of m×n basic units by dividing the digital image into n columns in the X direction and m rows in the Y direction in a predetermined analysis range in the digital image; calculating an average value of corrected saturations of n basic units of the digital image aligned in the X direction for each of the m rows aligned in the Y direction; obtaining an approximate line, one coordinate of a point of the approximate line being a position in the Y direction, and another coordinate of the point being the calculated average value of corrected saturations in the X direction for the position in the Y direction; and comparing a fluctuation obtained from relations between the approximate line and the average values of corrected saturations with a reference value which is determined for a demanded performance of a semiconductor element that would comprise the semiconductor film, in order to evaluate the crystallinity of the semiconductor film having the crystallinity that has been improved.