Semiconductor device arrangement, a method of analysing a performance of a functional circuit on a semiconductor device and a device analysis system
A semiconductor device arrangement comprising a functional circuit comprising a plurality of timing components and a reference module comprising a plurality of reference components is described. Each reference component comprises a reference timing component corresponding to a timing component of the plurality of timing components and a controllable timing component. The controllable timing component is arranged to provide a delay in dependence on an applied light stimulus. A method of analyzing a performance of a functional circuit on a semiconductor device is also described. A device analysis system for analyzing a functional circuit comprising a plurality of timing components is also described.
1. A method of analysing a performance of a functional circuit on a semiconductor device arrangement that includes a functional circuit comprising a plurality of timing components, a reference module comprising a plurality of reference components, each reference component comprising a reference timing component corresponding to a timing component of the plurality of timing components and a controllable timing component, the controllable timing component being arranged to provide a delay in dependence on an applied light stimulus, the method comprising:
operating the functional circuit of the semiconductor device arrangement with an operation condition;
inspecting the functional circuit during operation to identify a critical timing path and to identify at least one of the plurality timing components as a critical timing component on the critical timing path;
identifying one of the plurality of reference components to correspond to the critical timing component as a representative reference component;
operating the representative reference component with at least a reference operation condition corresponding to the operation condition of the functional circuit;
applying a plurality of light stimuli to the representative reference component; and
determining a timing behaviour of the representative reference component in dependence on at least the reference operating condition and the plurality of light stimuli.
2. A method according to claim 1 , the operating the representative reference component comprising operating the representative reference component with one or more further reference operation conditions corresponding to the operation condition of the functional circuit at different operation frequencies, and determining the timing behaviour of the representative reference component being performed in dependence on at least the reference operating condition, the one or more further reference conditions and the plurality of light stimuli.
3. A method according to claim 1 , the inspecting of the functional circuit during operation to identify the critical timing path comprising an optical inspection with light from an optical inspection unit.
4. A method according to claim 3 , the applying of the plurality of light stimuli comprising injection of light from the optical inspection unit.
5. A method according to claim 1 , the determining of the timing behaviour of the representative reference component in dependence on the operating condition and the plurality of light stimuli using a pre-determined relationship between light stimulus and associated timing delay.
6. A method according to claim 1 , the applying of the plurality of light stimuli to the representative reference component using laser assisted device alteration to the controllable timing component of the representative reference component.
7. A method according to claim 1 , at least one of the plurality of timing components of the functional circuit comprising a further controllable timing component, the further controllable timing component being arranged to provide a delay in dependence on an applied light stimulus, the inspecting the functional circuit during operation comprising applying a plurality of light stimuli to the further controllable timing component.
8. A method of adapting a functional circuit on a semiconductor device, the method comprising:
performing a method according to claim 1 ;
determining a timing adjustment from the timing behaviour;
designing an adapted timing component as the critical timing component adjusted to provide the timing adjustment; and
adapting the functional circuit to include the adapted timing component.
9. A device analysis system for analyzing a functional circuit comprising a plurality of timing components, the device analysis system comprising:
a test position arranged to receive a semiconductor device arrangement having the functional circuit to be analyzed and a reference module comprising a plurality of reference components, each reference component comprising a reference timing component corresponding to a timing component of the plurality of timing components of the functional circuit and a controllable timing component, the controllable timing component being arranged to provide a delay in dependence on light stimulus applied to the controllable timing component:
a testing unit arranged to operate the semiconductor device arrangement;
an inspection unit arranged to inspect the functional circuit during operation to identify a critical timing path, to identify at least one of the plurality timing components as a critical timing component on the critical timing path, and to identify one of the plurality of reference components to correspond to the critical timing component as a representative reference component;
an optical source arranged to provide a plurality of light stimuli to the representative reference component; and
a timing analysis unit arranged to measure a timing performance of a reference component in dependence on the operating condition and the plurality of light stimuli.
10. A device analysis system according to claim 9 , the functional circuit and the reference module being arranged on a single semiconductor device.
11. A device analysis system according to claim 9 , the functional circuit being arranged on a first semiconductor device and the reference module being arranged on a second semiconductor device.
12. A device analysis system according to claim 9 , at least one of the plurality of timing components of the functional circuit comprising a further controllable timing component, the further controllable timing component being arranged to provide a delay in dependence on an applied light stimulus.
13. A device analysis system according to claim 9 , the optical source being arranged to perform laser assisted device alteration.
14. A device analysis system according to claim 9 , the inspection unit comprising the optical source.