Abstract:
An angle-measuring device having a scanning device with which scanning of a closed serial first code and scanning of a closed serial second code is enabled, wherein a length of the closed serial second code is less than a length of the closed serial first code, and the closed serial first code and the closed serial second code have at least one common code section. The angle-measuring device includes a detector array for generating first and second sequences of code words of a predetermined scanning length upon scanning of the closed serial first code and second codes, respectively. The first sequence includes a first partial sequence and one common partial sequence, and wherein the common partial sequence is created upon scanning of the common code section. The second sequence includes a second partial sequence and the common partial sequence. The angle-measuring device further includes a decoding device designed for decoding the first and second sequences of code words, wherein the closed serial first and second codes as well as the predetermined scanning length are selected such that code words of the first and second sequences have a Hamming distance greater than 1.
Abstract:
An absolute angle coding that includes a first code sequence disposed within 360°, wherein the first code sequence has a first length and is disposed NA times in succession. The absolute angle coding includes a second code sequence disposed within 360°, wherein the second code sequence has a second length and is disposed NB times in succession, wherein the first code sequence and the second code sequence in combination absolutely unambiguously encode said 360°. In addition, NA is greater than or equal to 2 and NB is greater than or equal to 2 and NA is not equal to NB. The first length is not equal to the second length and the first code sequence and the second code sequence are disposed in one common track, in that a part of the first code sequence and a part of the second code sequence are disposed in alternation.
Abstract:
An angle-measuring device having a scanning device with which scanning of a closed serial first code and scanning of a closed serial second code is enabled, wherein a length of the closed serial second code is less than a length of the closed serial first code, and the closed serial first code and the closed serial second code have at least one common code section. The angle-measuring device includes a detector array for generating first and second sequences of code words of a predetermined scanning length upon scanning of the closed serial first code and second codes, respectively. The first sequence includes a first partial sequence and one common partial sequence, and wherein the common partial sequence is created upon scanning of the common code section. The second sequence includes a second partial sequence and the common partial sequence. The angle-measuring device further includes a decoding device designed for decoding the first and second sequences of code words, wherein the closed serial first and second codes as well as the predetermined scanning length are selected such that code words of the first and second sequences have a Hamming distance greater than 1.
Abstract:
An absolute angle coding that includes a first cyclically continued code sequence that cyclically continues a first code sequence a multiple number of times, wherein the first code sequence is disposed within 360° and includes a first succession of code elements that defines a first angle sector. The code further includes a second cyclically continued code sequence that cyclically continues a second code sequence a multiple number of times, wherein the second code sequence is disposed within 360° and includes a second succession of code elements that defines a second angle sector, wherein the first cyclically continued sequence and the second cyclically continued code sequence in combination unambiguously absolutely encode the 360°. The first angle sector is not equal to the second angle sector, and at least one of the second code sequences of the second cyclically continued code sequence is embodied only partially within said 360° and with a succeeding second code sequence forms a joint.
Abstract:
A process for fabricating a semiconductor device with copper interconnects is disclosed. In the process of the present invention, a layer of dielectric material is formed on a substrate. At least one recess is formed in the layer of dielectric material. Barrier layers and seed layers for electroplating are then deposited over the entire surface of the substrate. The recess is then filled with copper by electroplating copper over the surface of the substrate. The electroplated copper has an average grain size of about 0.1 &mgr;m to about 0.2 &mgr;m immediately after deposition. The substrate is then annealed to increase the grain size of the copper and to provide a grain structure that is stable over time at ambient conditions and during subsequent processing. After annealing, the average grain size of the copper is at least about 1 &mgr;m in at least one dimension. The copper that is electroplated on the dielectric layer is then removed using an expedient such as chemical mechanical polishing. The copper that remains is the copper in the recess.